Catharina sour, the Brazilian style
Catharina sour is one of the few beer styles to come out of South America and win formal recognition. It is a fresh, fruity kettle sour that suits hot weather and local fruit, which makes it an easy idea for Indian brewers to borrow.
A style named after a Brazilian state
Catharina sour comes from Santa Catarina in southern Brazil, a state with a large community of small breweries and strong German brewing heritage. Brewers there developed the style in the mid 2010s and worked together to define it. The BJCP later listed it as a local style, a rare honour for a beer style born this century.
The idea was simple. Take a light wheat beer in the Berliner weisse tradition, sour it quickly and add a generous dose of fresh fruit. The result is a beer around 4 to 5.5% ABV with bright acidity and a fruit character that tastes real rather than candied.
What the guidelines ask for
A Catharina sour should be pale to moderately coloured, with the fruit often tinting it pink, orange or purple. Bitterness is very low, usually in single figures of IBU. Acidity is clean and lactic, from kettle souring, with no funk, no barnyard and no vinegar.
The fruit has to be the star. Guidelines describe it as fresh fruit character, which separates the style from beers where fruit is a background hint. Alcohol stays moderate, so the beer remains refreshing. Our guide to BJCP versus BA style guidelines explains how these definitions are written and used.
How it is brewed
Brewers make a pale wort, often with a large share of wheat. They kettle sour it with Lactobacillus at around 35 to 45 °C until the pH falls to roughly 3.2 to 3.5. A boil then kills the bacteria and a clean ale yeast ferments the beer.
Fruit goes in after primary fermentation, once the most vigorous activity has passed, so that less aroma is blown off with the carbon dioxide. Common choices in Brazil include passion fruit, guava, mango, pitanga and jabuticaba. The yeast ferments the fruit sugar, which keeps the finish dry and lets the acid and fruit stand together.
Why the fruit matters so much
Fruit brings its own acids, sugars and aromatics. Passion fruit adds sharp tropical perfume and extra acidity. Guava adds a softer, musky sweetness. Mango adds body and colour but can turn flat if used without enough acid behind it.
Because the base beer is so plain, every flaw in the fruit shows. Under-ripe fruit tastes green. Old purée tastes cooked. The best Catharina sours use fresh, ripe local fruit in season. That is part of the style's spirit: it celebrates what grows nearby.
An easy style to translate to India
Indian brewers share a lot with their Brazilian counterparts: hot weather, drinkers who want refreshment and a wealth of tropical fruit. Jamun, kokum, guava and passion fruit from the Western Ghats and the North East would all make convincing Catharina-style beers.
Calling it a Catharina sour is a different matter. The name is tied to the style's Brazilian roots, so many brewers describe their version as a fruited kettle sour in the Catharina style. That is honest and still gives drinkers a useful signal. For the souring step itself, our guide to kettle souring at home walks through the process.
How it compares with its cousins
It helps to place Catharina sour next to the beers it resembles. Berliner weisse is lighter, usually under 4% ABV. It is traditionally served plain or with a syrup added at the table. Gose sits close in strength but carries salt and coriander. A generic fruited kettle sour may use any base and any amount of fruit.
Catharina sour sits in the middle. It is a little stronger than Berliner weisse, it skips the salt of gose and it insists on fresh fruit as the main event. Brazilian brewers argued that this combination was common enough in their region to deserve its own name. The guideline writers agreed.
For drinkers the useful takeaway is expectation. Order a Catharina sour and you should get a tart, dry, fruit-forward beer around 4 to 5.5% ABV with almost no hop bitterness. If it arrives sweet and syrupy, that is a smoothie sour wearing the wrong label.
Tasting one properly
Serve it cold, around 4 to 6 °C, in a tulip or wine glass so you can smell the fruit. Check the colour first, then the aroma: is the fruit fresh or jammy? On the palate look for clean acidity, low bitterness and a dry finish. Any butter, solvent or vinegar is a fault.
Judging a fruit beer well means knowing the base style and the fruit at once, then asking whether they work together. Start by tasting the fruit itself, fresh, next to the beer. If the beer reminds you of that fruit within two sips, the brewer has done the job.
Common questions
Where does Catharina sour come from?
It comes from Santa Catarina state in southern Brazil, where local brewers developed and defined it in the mid 2010s.
How strong is a Catharina sour?
Usually around 4 to 5.5% ABV, with very low bitterness and clean lactic acidity.
Is Catharina sour the same as Berliner weisse?
No. It shares the light, kettle soured base but adds a generous amount of fresh fruit and is usually a little stronger.
Which fruits are used in Catharina sour?
Brazilian brewers often use passion fruit, guava, mango, pitanga and jabuticaba. Any ripe, fresh fruit with good aroma can work.
