All About Kölsch Beer: How Brewers Make Kölsch Beer

Kölsch is a crisp, light-bodied beer that is pale in color and contains five percent of alcohol by volume (ABV). Its specific brewing method and ingredients give Kölsch its unique flavor and smooth texture. Originally brewed in Cologne (Köln), Germany, it has shown remarkable popularity stateside among American craft brewers, many of whom offer their versions of Kölsch-style beer alongside the familiar lineup of lagers and IPAs.

According to brewing tradition, true Kölsch beer is brewed only in Cologne, Germany, at such famous breweries as Reissdorf, Früh, and Gaffel. The European Union regulates the use of the term “Kölsch” as a geographical indication, but in the United States, some breweries that produce this beer style use the name. Other brewers choose to respect the German designation and instead label their offerings as “Kölsch-style ale.”

Kölsch beer is light-bodied, crisp, and features a balance of gentle malt sweetness and light hop bitterness. Kölsch beer can be similar to pilsner beer, but its flavor has a distinct light, subtle fruitiness.

Brewers of Kölsch use a mix of water, malted barley, German hops, and ale yeast. The specific varieties and various combinations make this style unique. The basic brewing process is as follows:

1. 1. Malt: Brewers add a German pilsner or two-row pale malt to water and heat the mixture for a set period. Sometimes, brewers add a slight amount of wheat malt for a hint of bready flavor and a full, persistent head on the final pour.
2. 2. Hops: At a certain point in the brewing process, the brewer adds the hops, ideally German noble hops, such as Spalt or Hersbrucker. The best Kölsch is all about balance, with gentle malty notes and light hoppiness. The bitterness, expressed in IBUs, is in the range of eighteen to twenty-eight.
3. 3. Yeasts: After the heating process finishes, the liquid—at this stage, before it has been fermented, it is called “wort”—is decanted into a fermenting container. The beermaker then adds the ale yeasts.
4. 4. Fermentation: At this step, yeasts transform the sugars into alcohol, creating subtle, additional flavors from compounds called “esters.” Kölsch is a top-fermenting variety of beer, meaning the yeasts tend to stay on the top of the wort. It is fermented warm at temperatures between fifty-eight and sixty-two degrees Fahrenheit.
5. 5. Conditioning: For the last step, the beer is cold-conditioned. This means that after the fermentation ends, the beer is left to sit for a few weeks in a cool environment, adding to the clarity and flavor of the finished product.

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