Module 8, Sour and wild beers

8.1.1.1 The specimen plate

Field marks first. Everything else in this style builds on this page.

The tell is the combination of very weak and very sour. Almost nothing else in beer does both at once. A sour beer that leaves you feeling you could drink four of them is very likely this one.

At 2.8% to 3.8% it is the lightest beer in this module by a wide margin. The official guidelines describe the body as light but never thin, and that is the line a good one walks.

Say it bair-LEE-ner VY-suh. Weisse means white, which is the old German word for a wheat beer rather than a description of the colour.

Berlin, and a very near miss

This was the everyday drink of Berlin for centuries. Records of it in the city reach back to 1572. Frederick William I promoted it across Prussia and had his son trained to brew it.

In 1809 French troops occupying Berlin called it the Champagne of the North, which tells you they were struck by the acidity and the fizz. At the nineteenth century peak, close to 700 breweries in the region made it.

Then Pilsner arrived and the style collapsed. By the end of the twentieth century two Berlin breweries were left making it, Berliner Kindl and Schultheiss, both under the same owner. Almost every example you can buy today is a revival rather than an unbroken line.

8.1.1.2 Three ways to sour a beer, and which one this is

Sour is not a style, it is a process. Three processes, three timescales, three completely different drinks.

The single most useful idea in this module: there are three ways to make a beer sour, and they are not variations on one theme. They take days, years, and years, and they give you three drinks that share only the acid.

Where Berliner Weisse sits

It sits in two places at once, and that is worth knowing before you order one. The traditional method is a mixed fermentation: brewing yeast and lactic acid bacteria go into the same vessel together and work side by side.

That co-fermentation is what produces the very dry finish. The bacteria take sugars the yeast leaves behind, so the beer runs down to a very low final gravity. Brewers call that high attenuation, which simply means most of the sugar got used up.

Most modern examples, including nearly all American ones, are kettle soured instead. The acid is the same acid. What you lose is the slow, faintly fruity Brett character a traditional one develops, so the beer tastes cleaner and simpler.

Two more decisions matter. The grain is roughly half wheat malt, which supplies the bready note and the fluffy head. And the hops are held near zero, because bitterness and sourness stacked together taste harsh.

8.1.2.1 Will you like it, how to ask, and what to buy

The reference tastes come from outside beer, and the ordering question is the same one every time.

Order one if you already like any of these

• Sharp lemonade, or a squeeze of lemon in sparkling water. That is close to the plain version.
• Plain kefir, Greek yoghurt or kombucha. All of them are lactic acid, which is the acid in this beer.
• Dry cider, or very dry sparkling wine. Same dryness, same high carbonation.
• Drinks you can have two of on a hot afternoon without noticing. At about 3% this is the lowest strength beer in the module.

Leave it for now if any of these is true

• You dislike sour things. There is no gentle version to work up from, and the acid is the whole beer.
• You want malt, sweetness or warmth. There is essentially none of any of those here.
• You want a big aroma. A plain Berliner Weisse smells of very little, and that is by design.
• You want a beer that fills you up. This one is deliberately thin and quick.

If the sourness is too much on its own, ask for the syrup. That is not a compromise, it is how most Berliners drink it, and it turns a very sharp drink into something closer to a soft drink with an edge.

At the bar

• In Berlin you will be asked rot oder gruen, red or green. Red is raspberry syrup. Green is woodruff, a grassy herb with a flavour somewhere between vanilla and cut hay.
• In the United States, ask whether it is fruited. Most American beers labelled Berliner Weisse are kettle soured and fruited, which is a different drink from the plain Berlin version.
• Ask how strong it is. American versions often run to 4% or 5%, which puts them outside the traditional range.
• A full pour is right. At about 3% you can comfortably have two.
• Serve it cold, at 40F to 45F, which is 4C to 7C. Cold suits a beer built on acid and carbonation.

What to buy this week

• Bayerischer Bahnhof Berliner Style Weisse, about 3%, imported from Leipzig in small bottles. This is the one that sits squarely inside the traditional range, so buy it if you want to know what the style is actually aiming at. Carried by bottle shops with a German section.
• Urban Chestnut Ku'damm, 4.2% and 8 IBU, brewed in St Louis and sold year round. The easiest one to find in the United States and the best value calibration point. Note that at 4.2% it is over the BJCP ceiling.
• Professor Fritz Briem 1809 Berliner Weisse, 5.0%, in 500ml bottles, imported by B. United. A deliberate historical recreation of a stronger, older version, so treat it as a comparison rather than as the baseline.

8.1.2.2 Food, faults, and the syrup myth

What to eat, what a bad one tastes like, and the correction that people get backwards most often.

Food

Judging one

A good one is cleanly sour, bone dry, very fizzy, and has a faint bready wheat note underneath the acid. The body should feel light but not watery. That difference between light and watery is what the guidelines mean by mouthfeel, which is simply how the beer feels in your mouth rather than how it tastes.

One test transfers to every beer in this module. Judge a sour beer on which acid you are tasting, not on how much of it there is. Lemon is right, vinegar is a fault, and cheese is a disaster.

Sources: BJCP 2021 Beer Style Guidelines, 23A Berliner Weisse · Brewers Association 2026 Beer Style Guidelines, Berliner-Style Weisse · Urban Chestnut Brewing, Ku'damm specification · B. United International, 1809 Berliner Weisse Style · Milk The Funk wiki, Berliner Weissbier production and fermentation

8.2.1.1 The specimen plate

Field marks first. Everything else in this module builds on this page.

A Gose is a pale wheat beer that has been soured on purpose, then seasoned with salt and coriander. The salt surprises people, and it should not. It has been part of the recipe for centuries, and it is the thing that makes the style feel different from every other sour beer.

Say it GOH-zeh. That is the spelling the BJCP prints, and it is two syllables. You will also hear GOH-zuh in American bars, which is close enough that nobody will correct you. What nobody says is goze, rhyming with rose.

The tell that settles it

Salt is not really a flavour here, it is an effect. Take a mouthful and notice what happens after you swallow: your mouth waters. The official guidelines describe a slightly tingly, mouthwatering quality, and that sensation is the single most reliable sign you are drinking a Gose.

Most people cannot point at the salt directly, because it is deliberately kept below the level where you would name it. They can always point at the watering. That is why this is a better field mark than any flavour note.

The second sign is what the tartness does. It arrives, it makes the beer feel bright, and then it gets out of the way. A Gose finishes dry and clean, which is why a beer this sour is also this easy to drink.

Goslar, Leipzig, and a gap of twenty years

The style is named after the river Gose in Goslar, a mining town in the Harz mountains. The water there carried minerals off the hills, and the local beer was salty because the water was. The oldest surviving document naming it dates from 1332.

It travelled south east to Leipzig, where it was licensed by the city council in 1738 and became the local drink. Between 1880 and 1920 there were around eighty gose taverns in Leipzig alone, and it was the most drunk beer in the city until Pilsner took over.

Then it stopped. The last brewery, run by Friedrich Wurzler, closed in 1966 when its owner died, and for twenty years nobody made it. Lothar Goldhahn reopened the Ohne Bedenken tavern in Leipzig in 1986, and Ritterguts Gose was re established in 1999. Everything you can buy today descends from that revival.

8.2.1.2 Wheat, a bacterium, salt and a seed

Four decisions, and one of them is the reason a beer can be sour without being spoiled.

Sourness in beer is usually a fault. Here it is the point, and the difference is control. A brewer making a Gose puts a specific bacterium into the beer on purpose, at a moment of their choosing, and takes it back out when the beer is as tart as they want.

Why the hops almost disappear

At 5 to 12 IBU there is barely any bitterness in this beer, and that is a decision rather than an oversight. Sourness and bitterness are both sharp sensations, and stacking them produces something harsh that nobody wants to finish.

There is a second reason. Hops inhibit the bacterium that does the souring, so a heavily hopped beer is harder to sour in the first place. The recipe and the process push in the same direction here.

8.2.2.1 The pale beers it gets mistaken for

Sour is not a style either. Four neighbours, four tests, and three of them are settled by smell.

All five beers below are pale, hazy and made partly from wheat. Colour will not help you here at all. Two questions settle almost every case: is it sour, and is there anything in it besides grain.

8.2.2.2 Will you like it, and what to buy

The reference tastes here come almost entirely from outside beer, which makes this an easy one to predict.

Order one if you already like any of these

• Lemonade, especially the sharp, not very sweet kind. This is the closest everyday match in the whole style.
• Salt on a margarita rim, or a squeeze of lime with salt. The salt and acid combination is exactly what this beer does.
• Salt on watermelon, or salted plums, or anything where salt is used to make fruit taste more like itself.
• Kombucha, sour candy, pickle juice, or Greek yoghurt. All of them are lactic acid, which is the same acid in this beer.
• Very cold drinks on a hot day. This is the most refreshing beer in the entire course.

Leave it for now if any of these is true

• You dislike sour things generally. This is not a beer that hides its acidity, and there is no gentle version to work up from.
• You find the idea of salt in a drink off putting. It is a mild version of the idea, but it is still the idea.
• You want something malty, sweet or warming. There is almost nothing of any of those here.
• You want a beer you can smell across the table. The aroma is light and lemony and it does not travel.

If the sourness is the problem but the wheat and the spice appeal, a Witbier gives you the same coriander with no acid at all. If the salt is the sticking point, a Berliner Weisse is the same idea without it.

What to buy this week

• Anderson Valley Holy Gose, 4.2%, 12 IBU. Sold year round in cans by a California brewery, and stocked widely across the United States. This is the beer that introduced the style to most American drinkers, and it is the right calibration point because you can buy it again next month.
• Westbrook Gose, 4.0%, from South Carolina, in 12 ounce cans. Tarter and saltier than the Anderson Valley, made with coriander and grey sea salt, and carried by large chains and supermarkets. Note that at 4.0% it sits just below the BJCP range.
• Original Ritterguts Gose, imported from Leipzig, is the traditional reference and the direct descendant of the 1999 revival. Specialist shops and better bottle shops carry it. Worth buying once so that you know what the German version tastes like.

8.2.3.1 Asking for it, and what to eat

A full pour, one question that changes what arrives, and food matches that all work the same way.

At the bar

• Ask whether it has fruit in it. Most American goses do, and a mango gose and a traditional one are different drinks with the same name on the tap list.
• Ask how tart it is. Bar staff answer this one easily and it is the single most useful question about any sour beer.
• A full pour is right. At 4.2% this is a session beer, and the tartness keeps it interesting for a whole glass.
• Serve it cold, at 40F to 45F, which is 4C to 7C. This is one of the few beers in the course that genuinely wants to be cold.
• If you avoid dairy, ask about lactose. Fruited versions often use it to soften the acid, and the can does not always say.

In Leipzig, where it comes from

At the Gosenschenke Ohne Bedenken, the tavern Lothar Goldhahn reopened in 1986, gose is served plain, with a shot alongside, or with a liqueur added. A splash of syrup is also traditional, in the same way that a Berliner Weisse is served with syrup in Berlin.

None of this will help you in an American bar, where you will be handed the beer as it is. It is worth knowing anyway, because it tells you the style was always treated as a base to adjust rather than as something fixed.

Food

8.2.3.2 Judging one, and the salt myth

What a good one does, the faults a soured beer is exposed to, and the correction that gives an ingredient back its history.

What a good one does

• The tartness is clean and bright, more like lemon than like vinegar.
• The salt sits right at the edge of noticeable. You should feel your mouth water and struggle to name why.
• The coriander reads as lemony rather than soapy or perfumed.
• It is highly carbonated and finishes dry, so it clears and invites the next mouthful.

The faults

One general point transfers. A soured beer is judged on whether the acid is the right kind, not on how much of it there is. Lemon is right, vinegar is wrong, and cheese is a disaster. That test works on every sour beer in this module.

Drink this one fresh. There is no alcohol and no malt weight to protect it, so a Gose is at its best young and gains nothing at all from being kept.

Sources: BJCP 2021 Beer Style Guidelines, 23G Gose · BJCP 2021 Beer Style Guidelines, 23A Berliner Weisse · Brewers Association 2026 Beer Style Guidelines, Leipzig-Style and Contemporary-Style Gose · Original Ritterguts Gose, documented history of the style · Anderson Valley Brewing, Holy Gose specification · Westbrook Brewing, Gose ingredients and description · Leipzig Region tourism, the Gosenschenke Ohne Bedenken

8.3.1.1 The specimen plate

Field marks first. The most surprising one is what is missing.

The field mark that settles it is the absence of bubbles. Traditional straight Lambic is served flat, from the cask, and it is the only style in this course where that is correct rather than a fault.

The second field mark is the smell. Hay, damp cellar and farmyard are the words the official guidelines actually use. None of that comes from an ingredient. It comes from the organisms that got into the beer.

A valley, and a season

Lambic is made in the Zenne valley and the Pajottenland, just south west of Brussels. It cannot simply be relocated, because the organisms that ferment it live in that air and in those buildings.

It is also seasonal. Brewing runs roughly from October to April, because the wort has to cool overnight in the open and summer air carries too many organisms that spoil the beer. Night temperatures need to sit roughly between 18F and 46F, which is minus 8C to 8C.

That window is shrinking. Warmer winters have cut the number of usable nights per year noticeably since the early twentieth century, which is a real commercial problem for the breweries rather than a talking point.

8.3.1.2 Spontaneous fermentation, and how it differs

The method is the style. Six decisions, three years, and no yeast packet anywhere.

Every other beer in this course begins with a brewer choosing a yeast. This one does not. The brewer makes the wort, which is the sweet liquid that becomes beer, then leaves it open to the night and waits.

1. Mash a grain bill of roughly 30 to 40 percent unmalted wheat, with barley malt making up the rest. Raw wheat supplies starch and protein that the wild organisms feed on slowly over the years.
2. Boil with hops that are three or more years old. Aged hops have lost their bitterness and aroma, but keep their preservative power. They hold off spoilage organisms without making the beer bitter.
3. Run the hot wort into a coolship, a wide shallow open pan under the roof, and leave it overnight. The surface area is enormous and the liquid is exposed to the air the whole time.
4. Let the air and the building inoculate it. More than a hundred kinds of yeast and bacteria have been found in Lambic. They come from the night air and from the brewery timber, not from a packet.
5. Fill old wooden barrels, often second hand port or sherry casks, and leave them alone.
6. Wait one to three years. Different organisms take over in turn, each one eating what the last one left, until there is nothing fermentable remaining.

That last step explains the dryness. The beer runs down to almost no residual sugar, which brewers call very high attenuation. It also explains the smell. Brettanomyces yeast makes phenolic compounds, which are the aromas people describe as barnyard, leather and medicine cabinet.

And it explains the price. A brewery has to fund three years of stock sitting in barrels before it can sell any of it.

Against the other two methods

One clarification that saves confusion later. A Gueuze is not a different beer, it is Lambic that has been blended and refermented in a bottle. The base liquid is the same. Everything that separates them happens after the barrel.

8.3.2.1 Will you like it, how to ask, and what to buy

This is the least beer like beer in the course, so the reference tastes come from cider, wine and cheese.

Order one if you already like any of these

• Bone dry farmhouse cider, especially the still, cloudy kind sold by the jug.
• Dry sherry, or an old white wine that has gone slightly nutty and oxidised.
• Strong washed rind cheese. If a cheese that smells of a barn appeals to you, so will this.
• Sourdough starter, kombucha, or anything where the smell is part of the pleasure rather than a warning.
• Drinks you sip and think about. This is not a refreshing beer and it is not trying to be.

Leave it for now if any of these is true

• You want a beer that tastes like beer. This one genuinely does not, and pretending otherwise sets you up badly.
• You dislike sour things. There is no gentle entry point here.
• Barnyard smells put you off food. That aroma is the style working correctly, not a fault.
• You want bubbles. A straight Lambic is flat, and a Gueuze is the version to go to instead.

If the funk appeals but the flatness does not, go to Gueuze first. It is the same beer, blended and refermented, and the carbonation makes the acidity much easier to take.

At the bar

• Ask whether it is a straight Lambic or a Gueuze. These get printed under the same heading and they are different drinks.
• Ask whether it is sweetened. Some commercial lambic is filtered and sweetened for supermarket shelves, and traditional lambic has no sugar in it at all.
• Ask for a small pour. At 5% to 6.5% with this much acid, a small glass is normal in Belgium and sensible everywhere else.
• Serve it cool rather than cold, at 45F to 50F, which is 7C to 10C. Very cold flattens the aroma, and the aroma is most of the beer.
• Do not send it back for being flat. That is the style.

What you can realistically buy

• Cantillon Grand Cru Bruocsella is the reference bottle, and it is a genuine unblended Lambic aged three years in oak. Cantillon has been brewing in Brussels since 1900 and imports to the United States through Lime Ventures. Expect it to be expensive, allocated and hard to find, and expect it to arrive flat.
• Allagash Coolship Resurgam, 6.3%, from Portland Maine, in 375ml bottles. Made by the same open cooling method with Maine air, then aged three years in oak. It is blended rather than straight, so it behaves like a Gueuze, but it is by far the easiest way for an American reader to taste what spontaneous fermentation does.
• For a straight Lambic on draught, a specialist Belgian bar is the realistic route. Very few American shops stock one, and that is a supply fact rather than a reflection on the style.

8.3.2.2 Food, faults, and the myth about the air

What to eat, which acid is the wrong one, and the correction that moves the credit from the sky to the timber.

Food

Judging one

A good one is sour, dry and complex, with the funk sitting alongside the acid rather than on top of it. There should be a fruit note somewhere, usually citrus peel or rhubarb, and the finish should be clean.

The general test again. Judge which acid you are tasting rather than how much. Lemon and lactic is right, vinegar is wrong. That rule works on every style in this module.

Sources: BJCP 2021 Beer Style Guidelines, 23D Lambic · Brewers Association 2026 Beer Style Guidelines, Belgian-Style Lambic · HORAL, the traditional lambic beers and their legal definitions · Brasserie Cantillon, Brussels Museum of the Gueuze · Allagash Brewing, Coolship Resurgam specification

8.4.1.1 The specimen plate

Field marks first. Set aside what you expect beer to taste like before you read this page.

This is the beer in the course most likely to catch somebody off guard, so it is worth saying plainly. A Gueuze is closer to a dry cider or a sparkling wine than to what most people picture when they hear the word beer.

There is no sweetness. There is no malty warmth. There is no hop character. What is left is acidity, carbonation and a long, complicated smell, and if you go in expecting beer you will simply be confused.

The two field marks

The first is the head. The guidelines describe it as thick, rocky and mousse like, and say it seems to last forever. Straight Lambic has no head at all, so this one detail tells you which of the two you are holding.

The second is the dryness. The beer has fermented for years and there is essentially no sugar left in it. Your mouth is left clean and puckered rather than coated, which is why a sour beer this strong is still easy to drink.

The blender, a job that barely exists elsewhere

Some of the most respected Gueuze in Belgium is made by people who own no brewery. They buy Lambic from breweries, age it in their own cellars, and blend it. The skill is in the blending rather than in the brewing.

That is why one region can produce a dozen clearly different Gueuzes from a small number of base beers. It also explains why bottles carry a year: the blend was assembled from specific barrels in a specific season.

8.4.1.2 How the blend carbonates itself

One clean piece of chemistry explains the bubbles, the cork, and why this beer keeps for years.

A Gueuze carbonates itself, and the method is elegant. Young Lambic and old Lambic bring different things to the bottle, and sealing them in together is what makes the beer sparkle.

• Young Lambic, about one year old, still contains sugars that have not been fermented and yeast that is still active.
• Old Lambic, two or three years old, has fermented out completely and carries the deep sour and funky flavours that only time produces.
• Blend them, seal the bottle with a cork and a wire cage, and the surviving yeast eats the remaining sugar. The gas has nowhere to go, so it dissolves into the beer.
• Leave it for months. The pressure builds, and the result is a beer as fizzy as sparkling wine, made without adding anything at all.

That is also why the beer keeps. Live yeast, high acidity and no sugar left make a hostile place for anything that would spoil it, so a good Gueuze can be cellared for ten years or more. Very little beer can say that.

And it explains the extreme dryness. The bottle stage takes the beer down to almost no residual sugar, which brewers call very high attenuation, meaning nearly all of the sugar got used up.

Against the other two methods

8.4.2.1 Will you like it, how to ask, and what to buy

Almost every useful reference taste for this beer comes from outside beer entirely.

Order one if you already like any of these

• Dry sparkling wine, especially brut Champagne or a hard, dry cremant. The acidity and the fine bubbles are genuinely comparable.
• Bone dry cider, the kind that tastes of apple skin rather than apple juice.
• Sherry, or white wine that has picked up a nutty, oxidised edge.
• Lemon, vinegar and pickles as flavours you seek out rather than tolerate.
• Strong cheese with a rind that smells of a cellar.

Leave it for now if any of these is true

• You want a beer that tastes like beer. This one does not, and the surprise is the most common reason people dislike it.
• You dislike sour drinks. There is no soft version of this style to begin with.
• Barnyard and leather smells put you off. They are correct here, not a fault.
• You want sweetness anywhere in the glass. There is none, and there was never meant to be.

At the bar and in the shop

• Look for Oude Geuze or Vieille Gueuze on the label. Those words are legally defined and mean the traditional method. Plain Geuze can be filtered, sweetened and pasteurised.
• Ask whether it is dry or sweetened. Bar staff know, and it is the difference between two very different drinks.
• Order a small pour. At 5% to 8% with this much acid, a small glass is normal in Belgium.
• Serve it cool rather than cold, at 45F to 50F, which is 7C to 10C. Too cold and the aroma disappears, and the aroma is most of what you are paying for.
• Stand the bottle upright for a day before opening so the sediment settles, then pour gently and leave the last inch behind.
• Open it carefully. These bottles are corked and caged for a reason, and the pressure is closer to sparkling wine than to beer.

What to buy this week

• Lindemans Cuvee Rene Oude Gueuze, 5.2%, in 12 ounce and 750ml bottles. Imported by Merchant du Vin since the early 1990s and the easiest traditional Gueuze to find in the United States. Note that Lindemans also sells sweetened fruit lambics, so check for the words Cuvee Rene.
• Oude Geuze Boon, 7%, a blend of one, two and three year old Lambics, imported by Global Beer Network and stocked by larger bottle shops. Rounder and fuller than the Lindemans, and a good second reference.
• Allagash Coolship Resurgam, 6.3%, from Portland Maine, in 375ml bottles. Made by the same open cooling method with Maine air and blended from one, two and three year old beer. Not Belgian and not called a Gueuze, and by far the easiest American way to taste the method.

8.4.2.2 Food, faults, and the spoiled beer myth

What to eat, which acid is the wrong acid, and the correction that saves a good bottle from being sent back.

Food

Judging one

A good one is sour and funky at the same time, with the two sitting alongside each other rather than one burying the other. There should be fruit in there somewhere, usually citrus peel, rhubarb or a hard pear note. The finish should be dry and clean.

One general point transfers. Judge a sour beer on which acid you are tasting rather than how much of it there is. Lactic acid is lemony and correct, acetic acid is vinegar and is a fault. That rule works on every style in this module.

Unlike most beer in this course, a good Gueuze improves with keeping. Live yeast, high acid and no residual sugar make it stable, and ten years in a cool cupboard rounds the sharpness into something softer.

Sources: BJCP 2021 Beer Style Guidelines, 23E Gueuze · Brewers Association 2026 Beer Style Guidelines, Traditional Belgian-Style Gueuze · HORAL, legal definitions of Lambic, Geuze and Oude Geuze · Brouwerij Boon, Oude Geuze Boon blend and refermentation · Merchant du Vin, Lindemans Cuvee Rene specification · Allagash Brewing, Coolship Resurgam specification

8.5.1.1 The specimen plate

Field marks first. Two names, two fruits, and a colour that the usual beer colour scale cannot describe.

The field mark that settles it is fruit flavour with no fruit sweetness. You get a clear mouthful of cherry or raspberry, and then nothing sweet arrives behind it. Very few drinks do that.

The second mark is a sensation. Your mouth feels scrubbed and dry within a second of swallowing, and you want another sip immediately. That is what happens when every sugar in the beer and in the fruit has been eaten.

Brewers call that attenuation, which just means how much of the sugar the microbes managed to get through. A fruit lambic is about as attenuated as beer gets.

Two names you will see on shelves

Where the habit came from

Fruit was not originally a brewery decision. The BJCP records that it was traditionally added by the blender or the publican, to widen the range of beers a local cafe could offer.

That history explains something odd about the category. A fruit lambic is a finishing step applied to a beer that was already finished, which is why one brewery can sell several versions of the same base beer.

The modern shelf reflects a second history. Sweetened, low strength fruit lambics were built for export in the twentieth century, and for most Americans those are the first and only lambic they meet.

8.5.1.2 Why fermented fruit tastes nothing like fresh fruit

One decision explains the whole style: the fruit goes in early enough to be eaten.

The brewer takes a lambic that has already spent months or years in a barrel. Whole fruit goes in, stones and all, at something like 200 g for every litre of beer.

• Age the base lambic first. Six months at the very least, and often one to three years in oak.
• Add whole fruit, not juice or syrup. Cantillon uses 200 g of sour cherries per litre for its Kriek and the same weight of raspberries for its Rose de Gambrinus.
• Let it ferment again. The fruit brings its own sugar, and the microbes already in the barrel eat every bit of it.
• Leave the stones in. Cherry stones give the almond and marzipan note that a Kriek has and a cherry drink does not.
• Blend and bottle. Refermentation in the bottle supplies the carbonation and the thick lasting head.

The result is fruit flavour with the fruit sugar removed. The BJCP puts it plainly: fermented fruit tastes noticeably different from fresh fruit. Cooked, concentrated and slightly savoury is closer than juicy.

That is also why the colour fades. A young Kriek is bright red and a five year old one is closer to brown, because the fruit pigment breaks down while the flavour stays.

The same shelf, three different drinks

Against its neighbours

8.5.2.1 Will you like it, how to ask, and what to buy

This is the one style where buying the wrong version will genuinely upset you, in either direction.

Go traditional if you already like any of these

• Dry cider, or a very dry sparkling wine. That is the closest thing most people have tried.
• Sour cherries in cooking, cherry stones, marzipan or amaretto. The stone note is right there.
• Lemon juice on food, or drinks you would call sharp rather than sweet.
• Beers with funk in them, meaning hay, farmyard and leather. The base beer supplies that.
• Anything you drink slowly out of a small glass.

Start with a sweetened one instead if any of these is true

• You have never had a sour beer and you are nervous about it.
• You like fruit soft drinks, cherry cola, or a sweet cider.
• Somebody at the table says they do not like beer at all. The sweet ones convert people.
• You want something at 2.5% to 3.5% that you can drink early in an evening.

Neither end is better than the other and both are correctly labelled. The mistake is buying one while expecting the other, which happens constantly with this style.

At the bar or the shop

• Look for Oude on the label, or Vieille in French. Those words are legally defined and mean the traditional method.
• Check the strength. Anything at 2.5% to 4% is a sweetened export bottle. Traditional ones run 5% to 7%.
• Ask whether it is sweetened. Nobody will mind the question and the answer is never in doubt.
• A small pour is normal for the traditional ones, and a tulip or small stemmed glass is right.
• Serve it cool rather than cold, at 45F to 50F, which is 7C to 10C. Fridge cold flattens the fruit.

What to buy this week

• Lindemans Oude Kriek Cuvee Rene, 7.0%, whole cherries with the pits fermented in 10,000 litre oak foudres for six months, then bottle conditioned. Imported by Merchant du Vin in 12 ounce and 750ml bottles. The easiest traditional Kriek to find in the United States, and the place to start.
• Oude Kriek Boon, 6.5%, from Brouwerij Boon in Lembeek. Whole cherries fermented in the lambic and then blended. Rounder and a shade softer than the Lindemans, and a good second reference.
• Lindemans Framboise, 2.5%, the sweetened raspberry bottle sold in most American supermarkets. Raspberry juice with sugar and stevia. Buy it on purpose, as the other end of the comparison.
• Cantillon Kriek, from Brussels, made with 200 g of sour cherries per litre. Imported to the United States through Lime Ventures. Expect it to be expensive and allocated, and expect it to be sharper than anything else on this list.

8.5.2.2 Food, faults, and the two lambics myth

What to eat with it, what a tired bottle tastes like, and the correction that saves people from a bad first experience.

Food

Judging one

A good traditional one balances three things: the fruit, the acidity, and the funk of the base lambic. The fruit should be clearly identifiable and should not be the only thing there.

The body should be light and the carbonation lively. There should be a puckering quality without a scraping one. That scraping edge is called astringency, and a little is fine while a lot is not.

The mouthfeel is worth naming here, since it just means how the beer feels rather than how it tastes. A traditional fruit lambic should feel light and prickly and should leave your mouth dry.

Sources: BJCP 2021 Beer Style Guidelines, 23F Fruit Lambic · Brewers Association 2026 Beer Style Guidelines, Belgian-Style Fruit Lambic · Merchant du Vin, Lindemans Oude Kriek Cuvee Rene specification · Merchant du Vin, Lindemans Framboise ingredients and strength · Brasserie Cantillon, fruit rates for Kriek and Rose de Gambrinus · Brouwerij Boon, Oude Kriek Boon

8.6.1.1 The specimen plate

Field marks first. This is the only red beer in the module and the only one that tastes of dark fruit.

The field mark that settles it is the colour combined with the fruit. A deep red beer that tastes of black cherry and plum, and is also clearly sour, is this style and very little else.

The second mark is a sensation rather than a flavour. Your gums feel slightly dried and gripped, the way they do after strong tea. That comes from the oak, and it is the wood signing its name.

Michael Jackson, the beer writer, called Rodenbach the Burgundy of Belgium. That comparison is doing real work: the beer has more in common with a light red wine than with most other beer.

West Flanders, and a borrowed English habit

The style belongs to West Flanders, and Rodenbach in Roeselare is the beer everything else is measured against. The family founded the brewery in 1821.

The method came from England. Eugene Rodenbach had been brewing porter there, where beer was routinely aged for long periods in large wooden vats and then blended before sale. He brought the practice home and applied it to a Belgian recipe.

Rodenbach now keeps 294 oak foeders, which is said to be the largest collection of wood aged beer anywhere. The smallest hold about 120 hectolitres and the largest about 650.

8.6.1.2 Mixed fermentation in wood

The third of the three souring methods, and the one where the brewer chooses the microbes and then waits anyway.

A foeder is a wooden vessel large enough to walk into, standing upright, holding anything from 120 to 650 hectolitres. Beer goes in, the brewery leaves it alone for one to two years, and what comes out is not what went in.

• Build a red malt bill. Vienna and Munich malts plus caramel malt give the colour and the toasty base. Maize is often used to lighten the body.
• Hop it lightly, with old fashioned low bitterness varieties. Bitterness would fight the acidity, and it is not what this beer is for.
• Pitch a mixed culture, not a single yeast. Brewing yeast makes the alcohol, Lactobacillus makes lactic acid, and Brettanomyces slowly makes the fruit and the phenolic notes. Phenolic here means aromas like spice, leather and clove that yeast produces rather than an ingredient supplying.
• Fill the foeders and wait. More organisms live in the wood itself. Slow air ingress through the oak produces a small amount of acetic acid, which is the balsamic edge.
• Blend young beer with aged beer to hit the flavour the brewery wants. This is the step that turns a variable batch into a consistent product.

The oak also contributes tannins, the same compounds that make strong tea grip your mouth. That drying grip is called astringency, and a little of it is expected here.

The blend is the product

Against the other two methods

8.6.2.1 Will you like it, how to ask, and what to buy

This is the most approachable beer in the module, and the one whose examples differ from each other the most.

Order one if you already like any of these

• Sour cherries, cherry jam, or a good black cherry soda. That flavour is right there in the glass.
• Balsamic vinegar on food, or a sweet and sour sauce. The same combination of sweetness and sharpness.
• Light red wine that you drink slightly cool, such as a young Burgundy or a Beaujolais.
• Sweet and sour together in general: tamarind, pomegranate molasses, salted plums.
• Beers you sip rather than gulp. This one has enough going on to hold your attention for a whole glass.

Leave it for now if any of these is true

• You dislike sour drinks entirely. This is the gentlest sour in the module, and it is still clearly sour.
• Vinegar in a drink is a hard no for you. The balsamic note is a feature and it does not hide.
• You want hop flavour or bitterness. There is essentially none.
• You want something cold and refreshing. This one wants to be cellar cool and taken slowly.

If you want an easier way in, start with a sweeter, softer example and work towards the sharp ones. That progression is unusually well signposted in this style, because the breweries themselves sell both ends.

At the bar

• Ask how sweet it is. This is the one question that matters, because examples run from cherry syrup to genuinely austere.
• Ask whether it is a blend and roughly how much aged beer went in. Bar staff at a specialist place will know, and it predicts the sharpness directly.
• A small pour is normal, and a full pour is fine at 5% to 6%. This is not a beer to hurry.
• Serve it cool rather than cold, at 50F to 55F, which is 10C to 13C. Fridge cold hides the fruit and the wood.
• A stemmed goblet is right. It gathers the aroma, and the aroma is a large part of what took two years to make.

What to buy this week

• Rodenbach Classic, 5.2%, a blend of about one quarter two year foeder beer with three quarters young beer. Imported to the United States by Regal Wine Imports and the standard reference point for the style. Start here.
• Rodenbach Grand Cru, 6.0%, two thirds foeder aged, sold in small bottles and four packs. Much sharper and deeper than the Classic. Buying both is the single most useful thing you can do with this style.
• Duchesse de Bourgogne, 6.2%, from Verhaeghe in Vichte, blending an eighteen month oak aged beer with an eight month one. Widely available in the United States, sweeter and rounder, and the friendliest first bottle for somebody nervous about sourness.
• Cuvee des Jacobins Rouge, 5.5%, from Omer Vander Ghinste, aged eighteen months in foeder with no young beer blended in. Imported by S.K.I. Beer. Sharper and more austere, and the clearest picture of what the wood alone does.

8.6.2.2 Food, faults, and the vinegar myth

The most food friendly beer in the module, the faults it can develop, and the correction it exists to make.

Food

Judging one

A good one balances three things at once: sourness, dark fruit and a soft toasty malt. None of them should bury the others. The body should feel medium and slightly gripping from the oak, and the carbonation should be low to medium.

That gripping quality is part of the mouthfeel, which just means how a beer feels rather than how it tastes. Here it is the wood making itself known, and a small amount is correct.

The general rule again. Judge a sour beer on which acid you are tasting rather than how much. Here the wrinkle is that a little acetic acid is correct in this one style, which is not true anywhere else in the module.

Sources: BJCP 2021 Beer Style Guidelines, 23B Flanders Red Ale · Brewers Association 2026 Beer Style Guidelines, Belgian-Style Flanders Oud Bruin or Oud Red Ale · Palm Belgian Craft Brewers, Rodenbach Grand Cru blend and strength · Regal Wine Imports, Rodenbach Classic blend and United States distribution · Beervana, the making of Rodenbach, foeder count and maturation

8.7.1.1 The specimen plate

Field marks first. This is the dark, sweet, gently sour corner of Belgian brewing.

The field mark that settles it is sweetness arriving before the sourness. Malt, caramel and dried fruit land first, and the acidity turns up at the very end as a tang rather than a bite.

The second mark is what your mouth does not do. There is no drying grip on your gums and no scrape. The BJCP is blunt about it and lists no astringency as part of the style.

The third is the head. An Oud Bruin usually holds a decent ivory head, which a Flanders Red often will not. In a dim bar that is sometimes the fastest thing to look at.

East Flanders, and a very old brewery

The style belongs to East Flanders, and to Oudenaarde in particular. Liefmans is the brewery everything else is measured against, and its roots are usually traced to the sixteen hundreds.

The name is not poetic. Oud bruin is Dutch for old brown, and it describes exactly what the beer is: a brown beer that has been kept for a while.

Geography matters here more than it looks. Flanders Red comes from West Flanders and Oud Bruin from East Flanders. Two neighbouring provinces solved the same problem in two different ways.

8.7.1.2 The decisions that make it brown and not red

Two brewing choices separate this beer from Flanders Red, and neither of them is the colour.

The colour is the obvious difference and the least important one. The decisions that matter are which microbes get invited and where the beer is kept while it ages.

• Build a dark malt bill. Pilsner malt with dark crystal malts, a colour malt, and often maize to keep the body from getting heavy.
• Hop it lightly with low alpha continental varieties. Bitterness is not the point and would fight the fruit.
• Pitch brewing yeast with Lactobacillus. That is the important one. Lactobacillus makes clean lactic acid, and this style does not lean on Brettanomyces.
• Age it, often in steel rather than wood. Wood is allowed and not required, which is the single biggest structural difference from Flanders Red.
• Blend young beer with aged beer. The BJCP notes that blending adds smoothness and balances any harsh sour edge.

Skipping the wood explains most of what you taste. No oak means no tannins, so no drying grip. It also means far less oxygen creeping in, so far less of the balsamic vinegar note that defines its red cousin.

Some examples do develop a light spicy or peppery note as they age. That is a phenolic character, which means spice, pepper or clove aromas that yeast produces rather than a spice supplying. It is optional here rather than expected.

Oud Bruin against Flanders Red

8.7.2.1 Will you like it, how to ask, and what to buy

This is the easiest sour beer in the module to hand to somebody who says they do not like sour beer.

Order one if you already like any of these

• Raisins, prunes, dates or a sticky dried fruit pudding. That fruit is the centre of the beer.
• Sweet and sour sauce, or a fruit chutney next to cheese. Same structure, same appeal.
• Balsamic vinegar on food, though you want much less of that note than a Flanders Red gives.
• Brown sugar, treacle or dark caramel flavours.
• A cool glass of something you sip. This beer does not want to be gulped.

Leave it for now if any of these is true

• You want hop flavour or bitterness. There is almost none.
• You want something crisp and refreshing. This is round and slightly heavy.
• Sweetness in beer bothers you. Several well known examples are noticeably sweet.
• You dislike dried fruit. It is the dominant flavour and it does not hide.

This is the style to hand somebody who thinks sour beer is not for them. The acidity is mild and arrives last, and the malt does the talking for the first two seconds.

At the bar

• Ask how sweet it is. Examples run from dry and tangy to openly sweetened, and both are sold as Oud Bruin.
• Ask whether it is a blend. Most good ones are, and blending is what keeps the sourness from getting harsh.
• A full pour is fine at 5% to 6%. Take a small one if you are handed something at 8%.
• Serve it cool rather than cold, at 50F to 55F, which is 10C to 13C. Cold flattens the dried fruit.
• A stemmed goblet or a wine glass is right. The aroma is a large part of what you paid for.

What to buy this week

• Liefmans Goudenband, 8.0%, from Oudenaarde in East Flanders. Mixed fermentation in open vats, aged four to twelve months, then blended with young beer and bottle conditioned. Imported to the United States and stocked by larger bottle shops. This is the reference and the place to start.
• Petrus Oud Bruin, 5.5%, from Brouwerij De Brabandere in Harelbeke, sold in some markets as Petrus Roodbruin. A blend that includes their long foeder aged Petrus Aged Pale. Lighter and easier than the Goudenband.
• Ichtegems Oud Bruin, 5.5%, from Brouwerij Strubbe in West Flanders. Imported to the United States in bottles. A good third data point, and proof that the province boundary is a tendency rather than a law.
• New Belgium La Folie, 6.5%, from Fort Collins in Colorado. Aged in large French oak foeders holding what the brewery calls the oldest continuous souring culture in America. Widely available in 375ml bottles. Sharper than the Belgian examples, and the easiest of these to actually find.

8.7.2.2 Food, faults, and the brown Rodenbach myth

A beer built for the dinner table, the faults it can develop, and the correction it exists to make.

Food

Judging one

A good one puts rich malt, dried fruit and a mild sourness in balance. The acidity should support the fruit rather than lead. Body is medium to medium full and the carbonation low to moderate.

The mouthfeel matters, which just means how the beer feels rather than how it tastes. It should feel smooth and round, with no scrape and no thinness.

Sources: BJCP 2021 Beer Style Guidelines, 23C Oud Bruin · Brewers Association 2026 Beer Style Guidelines, Belgian-Style Flanders Oud Bruin or Oud Red Ale · Brouwerij Liefmans, Goudenband strength, ageing and blending · New Belgium Brewing, La Folie foeder ageing and souring culture

8.8.1.1 The specimen plate

Field marks first, with a warning. This is the one entry in the course where the plate describes a method rather than a beer.

The field mark that does hold is a sensation. The beer is drier and thinner than its strength suggests. An 8% wild ale can feel lighter in your mouth than a 5% brown ale.

That happens because Brettanomyces and Pediococcus eat long sugars that ordinary brewing yeast cannot touch. Brewers call the result high attenuation, which just means most of the sugar has gone.

The second mark is funk. Hay, leather, barnyard and sometimes smoke or earth. Those are phenolic aromas, which means spicy, medicinal or barnyard smells that yeast makes rather than an ingredient supplying.

What the category actually contains

The word American is doing very little work. The BJCP says directly that the label does not require an American base style or an American brewery. It marks an approach rather than a country.

8.8.1.2 Barrels, house cultures and blending

Three levers do almost all the work here, and none of them is the recipe.

Ask an American wild ale brewer about the malt bill and you will get a short answer. Ask about the barrels and you will be there for an hour. That tells you where the flavour comes from.

1. The house culture. Most of these breweries keep their own blend of yeast and bacteria, built up over years. It lives in the barrels as much as in a lab flask, and it is why two breweries following the same recipe get different beer.
2. The barrels. Usually used wine or spirit barrels. Oak supplies tannin and vanilla, the previous contents supply their own flavour, and the wood lets a little air in, which slowly changes the beer.
3. Blending. Barrels never taste the same. The brewer tastes each one and decides which ones go together, which is where a variable process becomes a sellable product.

Jolly Pumpkin La Roja is a clear example. It ages exclusively in bourbon barrels, and the finished beer is blended from barrels that have sat for anywhere between two and fifteen months.

Time is the fourth lever and the one nobody enjoys. Months at the fast end and several years at the slow end. A brewery doing this has money sitting in wood for a long time, which is why the bottles cost what they do.

Against the beers it grew out of

8.8.2.1 Will you like it, how to ask, and what to buy

With no numbers to read, the questions you ask do all the work here.

Order one if you already like any of these

• Dry cider, or a dry sparkling wine. The dryness is the first thing you will notice.
• Tropical fruit and stone fruit: pineapple, mango, apricot, peach. Young Brett gives all of those.
• Farmhouse cheese, or anything you would describe as earthy or barnyardy in a good way.
• Wine, especially if you enjoy talking about the barrel it sat in.
• Being surprised. Two bottles from the same brewery can be genuinely different beers.

Leave it for now if any of these is true

• You want to know what you are getting before it arrives. That is the one thing this category cannot promise.
• Funk bothers you. Leather and barnyard notes are the point and they do not hide.
• You want hop flavour or bitterness. Almost none of these have any.
• You want value. These are expensive because the beer sat in wood for years.

The safest first bottle is a mixed fermentation beer at moderate strength from a brewery with distribution. Save the allocated bottles until you know whether you like the family.

At the bar: three questions replace the missing guideline

1. How sour is it, on a scale from a squeeze of lemon to a mouthful of vinegar. Nothing on the label tells you this and it matters most.
2. What was in the barrel before the beer. Red wine, white wine, bourbon and tequila all leave different marks, and it predicts the finish better than any style name.
3. How funky is it. Some of these are clean and fruity, others are full farmyard. Both are correct and you have a preference.

A small pour is normal and often all you can buy. Serve it cool rather than cold, at 45F to 55F, which is 7C to 13C. Pour carefully and leave the sediment in the bottle unless you want it.

What to buy this week

• Jolly Pumpkin La Roja, 7.2%, from Dexter in Michigan. A sour amber aged only in bourbon barrels and blended from barrels between two and fifteen months old. Unfiltered, unpasteurised and available year round in most of the country. Start here.
• Jolly Pumpkin Bam Biere, 4.5%, a farmhouse ale from the same brewery, oak aged for about two months. Cheaper, lighter and much easier, and a good first taste of what an oak aged house culture does.
• Russian River Consecration, 10.0%, from Santa Rosa in California. Aged in used Cabernet Sauvignon barrels with black currants, using Brettanomyces and bacteria. A year round bottle and a clear example of BJCP 28C, where the barrel and the fruit are the point.
• Firestone Walker Barrelworks Agrestic, a wild red ale from the barrel programme in Buellton, California, sold in 375ml bottles. Firestone Walker distributes widely, so this is often the easiest of the four to find outside its home state.

8.8.2.2 Food, faults, and the wild myth

What to eat with beers this varied, how to tell a fault from a feature, and the word in the name that is not true.

Food

Judging one

Judge it against what the brewery said it was trying to do, since there is no guideline figure to check it against. The BJCP asks for the same thing from competition entrants.

Two general rules do hold. The wild character should be complex rather than one loud note. And the acidity should not be biting or vinegary, which the guidelines state directly.

Body is part of the mouthfeel, which just means how the beer feels rather than how it tastes. Light is expected here. Watery is not, and the difference is whether flavour arrives with the lightness.

Sources: BJCP 2021 Beer Style Guidelines, category 28 American Wild Ale · BJCP 2021 Beer Style Guidelines, 28A Brett Beer · BJCP 2021 Beer Style Guidelines, 28B Mixed-Fermentation Sour Beer · Brewers Association 2026 Beer Style Guidelines, American-Style Sour Ale and Brett Beer · Jolly Pumpkin Artisan Ales, La Roja barrel ageing and blending · Russian River Brewing, Consecration barrels, fruit and strength

8.9.1.1 The specimen plate

Field marks first. Everything else in this module builds on this page.

This is the only entry in the course named after a piece of equipment. A Pilsner is named after a town and a Saison after a season. A kettle sour is named after the vessel the souring happens in, because the method is the whole idea.

The tap list will rarely use the words. You will see sour, or fruited sour, or a fruit name and a smiling label. Almost every one of them was made this way, and knowing that tells you what to expect before you order.

The tell that settles it

Smell it first, then taste it. A kettle sour is sharply sour in the mouth and gives you almost nothing surprising in the nose. You get fruit, and you get a faint clean tang, and that is all.

That absence is the field mark. The old sour beers smell of hay, wet leather, farmyards and old books before you have taken a sip. This one smells of what was put into it and nothing else, because everything that could have made it smell strange was boiled to death.

The second sign is speed. The acid hits at the front, peaks fast, and is gone by the time you swallow. Nothing lingers, nothing develops, and your mouth is clear within a couple of seconds. Sour beers made slowly do not behave like that.

Why it exists at all

Sour beer used to be expensive to make. A brewer had to fill oak barrels, give up the space for one to three years, accept that some barrels would be ruined, and blend the survivors. Very few breweries could afford the wait.

Kettle souring removed the wait. A brewery can now put a sour beer on tap about two to three weeks after brew day, using equipment it already owns. That single change is why sour beer went from a specialist import to something on almost every American tap list.

The trade is real and worth stating plainly. You get one clean acid instead of the dozens of compounds that time in wood produces. Whether that is a loss depends entirely on what you wanted from the glass.

8.9.1.2 Two days in the kettle

Six steps in order, and one of them is the off switch that the old methods never had.

Start with one word you will need. Wort is the sweet liquid a brewer gets after soaking crushed grain in hot water and before the yeast goes in. It is beer before it has become beer. Every step below happens to the wort or to what the wort turns into.

The whole method is one idea: sour the wort while you still have complete control of it, then destroy the thing that soured it, then make beer as usual. Everything else follows from that.

1. Mash the grain as normal. Pale malt and often wheat, nothing unusual.
2. Run the wort into the kettle and heat it briefly to kill whatever came in on the grain. The brewer wants one organism working, not a crowd.
3. Cool it to 90F to 110F, which is 32C to 43C, and add Lactobacillus. That temperature is chosen because the bacteria work fastest there.
4. Hold it for 24 to 48 hours and check the acidity. The brewer stops when it tastes right, usually around pH 3.2 to 3.5.
5. Boil it. This kills the bacteria, and it is the step that makes the whole method work.
6. Add hops, cool, add ordinary ale yeast, and ferment for about a week. Add fruit at the end if the beer is going to have fruit.

Where each decision shows up in the glass

Why the boil is the interesting part

A brewer aging a sour beer in a barrel is making a bet. The organisms carry on working for months, the result cannot be predicted precisely, and some barrels come out wrong and are poured away.

A brewer kettle souring has a dial and a switch. Taste it, decide it is sour enough, turn the heat on, and the process ends. That is why two cans of the same fruited sour taste the same and two bottles of the same Gueuze do not quite.

8.9.2.1 The sour beers it gets mistaken for

Sour is not a style. It is a result, and four completely different processes arrive at it.

The word sour on a tap list tells you almost nothing. It describes a sensation, in the same way that the word dark describes a colour, and beers that share it can be as different from each other as a Pilsner is from a Porter.

One question does most of the sorting: how long did this take. You cannot read that off the glass directly, but you can smell it, because time in wood leaves smells that two days in a kettle cannot produce.

8.9.2.2 Will you like it, and what to buy

The reference tastes here come from the sweet shop and the juice aisle, which makes this an easy one to predict.

Order one if you already like any of these

• Sour sweets. Sour Patch Kids, sour cherry drops, salted plums. This is the closest everyday match and it is not a joke, since fruited sours are built on the same balance of acid against sugar.
• Sharp lemonade, limeade, or an unsweetened cranberry juice.
• Kombucha, kefir, plain Greek yoghurt, or pickle juice. All of them are lactic acid, which is the same acid that makes this beer sour.
• A margarita, a daiquiri, or anything where lime is doing the heavy lifting.
• Fruit smoothies, if what you like about them is the tang rather than the creaminess.

Leave it for now if any of these is true

• You dislike sour things. There is no gentle version to work up from, and the fruited ones are often the most acidic on the list.
• You want bitterness. There is essentially none, and a hop lover usually finds this beer beside the point.
• You want something malty, warming or filling. The base beer is deliberately almost flavourless so the acid and the fruit can lead.
• You dislike sweet drinks. Many fruited sours finish sweeter than a soft drink, and a few are frankly desserts.

If the acid appeals but the sweetness does not, ask for an unfruited one, or ask for a Gose. If the fruit appeals but the acid does not, a Fruit Beer under the ordinary category will give you the fruit with no sourness at all.

What to buy this week

• Anderson Valley Blood Orange Gose, 4.2%, 12 IBU, sold year round in cans and stocked nationally. Buy this one first. The brewery describes it plainly as a kettle soured wheat ale, so you can taste the method and read the confirmation on the same afternoon.
• Dogfish Head SeaQuench Ale, 4.9%, 10 IBU, year round, and about as widely distributed as a sour beer gets in the United States. Made with black limes, lime juice and sea salt. It is the most reliable way to find one of these in an ordinary supermarket.
• Odell Sippin Pretty, 4.5%, a fruited sour with guava, lime and pink salt, carried across much of the western and central United States. A good third point because the fruit leads much more clearly than in the other two.

8.9.3.1 Asking for it, and what to eat

Two questions change what arrives, and the food matches all work by the same mechanism.

At the bar

• Ask how sweet it is. This is the single most useful question, because these beers run from bone dry to dessert and the tap list never says which.
• Ask whether it has lactose in it. Lactose is a sugar from milk, so a beer containing it is not vegan and not suitable if you avoid dairy. Many fruited sours use it and the can rarely mentions it.
• Ask for a taster first if the fruit is unusual. Bar staff expect this with sours more than with any other category.
• A full pour is right at 4% to 6%. If it is above 7% or reads as a dessert, take a smaller one.
• Serve it cold, at 40F to 45F, which is 4C to 7C. Warmth makes the acid taste heavy rather than bright.

Food

8.9.3.2 Judging one, and the authenticity myth

What a good one does, the one fault this method produces, and the answer to the charge that this is not real sour beer.

What a good one does

• The acid is clean and lemony rather than sharp and vinegary, and it arrives and leaves quickly.
• The fruit smells like the fruit it claims to be, not like a sweet or a syrup.
• Sweetness supports the acid instead of burying it. You should still want a second mouthful.
• Carbonation is high and the finish is dry enough to clear your mouth.
• Nothing about the aroma is strange. Clean is the target here, and clean is harder than it sounds.

The faults

One general point transfers. A soured beer is judged on which acid you are tasting rather than on how much of it there is. Lemon is right, vinegar is usually wrong, and cheese is always a disaster.

Drink this one fresh. There is no alcohol and no malt to protect it, the fruit aroma is the first thing to fade, and nothing in the can is going to improve with time. Check the date and buy the newest one on the shelf.

Sources: BJCP 2021 Beer Style Guidelines, 28D Straight Sour Beer · BJCP 2021 Beer Style Guidelines, 28C Wild Specialty Beer · BJCP 2021 Beer Style Guidelines, 23E Gueuze · BJCP 2021 Beer Style Guidelines, 23B Flanders Red Ale · Brewers Association 2026 Beer Style Guidelines, American-Style Sour Ale and Fruited American-Style Sour Ale · White Labs, making a kettle sour with Lactobacillus cultures · Anderson Valley Brewing, Blood Orange Gose specification · Dogfish Head, SeaQuench Ale specification

8.C.1 The rest of the sour and wild beers

A lookup screen. One card, then twelve lines on it.

This module has one Tier C style, so this screen is short. Nobody expects you to memorise it. It is here so that a bottle labelled Brett does not stop you at a shelf.

Brett Beer

• What it is, the physical tell is dryness. The beer is thinner and drier in your mouth than its colour and its smell promise, the carbonation is high, and the head is large and lasting. Then there is the smell: fresh bottles give pineapple, mango and citrus, and older ones give hay, leather and a farmyard note that people either love or refuse.
• Where it is from, nowhere in particular, which is unusual. The yeast was described in 1904 by N. Hjelte Claussen at the Carlsberg laboratory, who named it Brettanomyces, meaning British fungus, because he was studying what happened to English beers left in wood. The deliberate modern Brett beer is largely American and dates from the 2000s, and Orval in Belgium has been made this way since the 1930s.
• Why it tastes that way, the brewer pitches a second yeast, either alongside the ordinary brewing yeast or at bottling, and then leaves the beer alone for months. Brettanomyces eats long sugars that ordinary brewing yeast cannot touch, so the beer keeps drying out in the package. That single decision explains the thin body, the high fizz and the fact that the beer tastes different a year later.
• Confused with, Lambic at 8.3, which is soured by bacteria and left to catch its own microbes from the air, so it is genuinely tart where this is not. American Wild Ale at 8.8, which is the family heading this style sits under, and whose mixed fermentation versions do contain bacteria and are sour. Kettle sour at 8.9, which is sharply acidic and contains no Brettanomyces at all. Flanders Red at 8.6, which uses Brett for its cherry note and adds bacteria for the acid on top.
• Numbers, both guideline books say the same thing: everything varies with the beer underneath. In practice most bottles land between 5% and 9% ABV, bitterness is low, and the colour can be anything from pale gold to black. Serve at 50F to 55F, which is 10C to 13C, in a tulip or a wine glass.
• You will probably, split. If you like very dry cider, a washed rind cheese or a bone dry sparkling wine, this will make sense to you quickly. If the smell of a stable is not something you want in a drink, a heavily aged one will not win you over, and a young fruity one still might.
• Ordering it, say: is it sour, or just funky. Those are two different things and bar staff answer the question happily, because they get asked it constantly. Ask for a small pour first, since this is the most divisive beer on most lists.
• Eat with, a washed rind cheese or roast pork with crackling. The beer is dry and highly carbonated, so it cuts fat cleanly, and the farmyard note in the beer and the funk in the cheese are doing the same job from opposite directions.
• Is it any good, at its best it is one of the most interesting things in beer, and it is genuinely divisive. Nobody should feel bad about disliking it. A good one is dry, bright and lively. A bad one is thin and empty, or smells of nail polish remover, or gushes out of the bottle when you open it because the yeast kept eating after somebody stopped paying attention.
• Try this one, Orval, 6.2%, from the Trappist abbey in Belgium, in the skittle shaped brown bottle. It is dry hopped and then bottled with Brettanomyces, it is imported into the United States by Merchant du Vin, and good bottle shops carry it all year. Buy two, drink one fresh and keep the other for a year, and you will have taught yourself more about this yeast than any screen can.
• The myth, Brettanomyces is not a contamination that sneaks in from the air. Brewers buy the strain they want and pitch it deliberately, and both guideline books ask a brewer entering a competition to say which Brett they used. Its old reputation as a spoilage organism is real history and is no longer what is happening in these bottles.
• Remember, a second yeast that never stops eating.

8.C.2 Telling it apart

One member means comparing it against the beers you already met in this module.

A group of one cannot be sorted against itself. So the honest version of telling them apart is to set Brett Beer next to the four beers in this module it actually gets confused with. Read down the sour column first.

Sources: BJCP 2021 Beer Style Guidelines, 28A Brett Beer · BJCP 2021 Beer Style Guidelines, category 28 American Wild Ale, for the sub-style codes · Brewers Association 2026 Beer Style Guidelines, Brett Beer and Mixed-Culture Brett Beer · Merchant du Vin, Orval Trappist Ale, bottled with Brettanomyces and imported into the United States · Difford's Guide, Orval, 6.2% ABV, dry hopped after fermentation and refermented in the bottle