What is Kölsch Beer?
Kölsch is a pale, crisp hybrid beer from Cologne: fermented cool with ale yeast, then cold-conditioned like a lager. Here are the style stats and how to brew one.
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The short answer: Kölsch is a pale, crisp beer from Cologne (Köln), Germany. It’s a hybrid: fermented with ale yeast at a cool 58 to 62°F (14 to 17°C), then cold-conditioned like a lager, so it tastes clean with only a faint fruitiness. It’s light, soft and dry, and traditionally served in small 0.2 L glasses called Stangen.
| Kölsch (BJCP 5B) | Typical range |
|---|---|
| ABV | 4.4–5.2% |
| Original gravity | 1.044–1.050 |
| Final gravity | 1.007–1.011 |
| Bitterness | 18–30 IBU |
| Colour | Very pale gold, 3.5–5 SRM |
| Grain | Pilsner malt; up to 20% wheat is allowed but rare in Cologne |
| Hops | German noble hops, light touch |
| Yeast | Kölsch ale yeast at 58–62°F (14–17°C), then 3–4 weeks near freezing |
Where Kölsch comes from
Cologne brewed with top-fermenting ale yeast for centuries, and kept doing it when most of Germany moved to lager in the 1800s. The pale, crisp beer we now call Kölsch took its modern shape in the early 20th century, as Cologne’s brewers answered the pale lagers that were taking over. Düsseldorf, just down the Rhine, kept its ale yeast too but went darker and more bitter with Altbier. The two cities still argue about which is better.
A protected name
In 1986 the Cologne brewers signed the Kölsch Konvention. It defines Kölsch as a pale, highly attenuated, hop-accented, clear (filtered), top-fermented beer, brewed only by member breweries in and around Cologne. The European Union later made it a protected geographical name, so in Europe “Kölsch” works like Champagne: brewed anywhere else, it needs another name. Outside Europe you’ll often see “Kölsch-style”.
What Kölsch tastes like
Brilliantly clear, very pale gold, with a white head that doesn’t hang around long. Soft, slightly sweet Pilsner malt, a low floral or spicy hop note, and a faint fruitiness (apple, pear or cherry) that you have to look for. Some examples have a touch of sulphur when very fresh. The body is light, the finish is dry and the bitterness is moderate. It should never taste like a pale ale.
| Kölsch | German pils | Altbier | Blonde ale | |
|---|---|---|---|---|
| Yeast | Kölsch ale yeast, fermented cool | Lager yeast | Altbier ale yeast, fermented cool | Clean ale yeast |
| Colour | Very pale gold | Straw to light gold | Amber to copper | Yellow to gold |
| Bitterness | 18–30 IBU | 22–40 IBU | 25–50 IBU | 15–28 IBU |
| Character | Soft, delicate, faint fruit | Crisp, hoppy, firm bitter finish | Bitter, malty, clean | Simple, easy, slightly sweet |
How to brew a Kölsch
- Grain: nearly all German Pilsner malt. A few percent of Vienna or wheat is fine; leave out crystal malt.
- Water: soft, with a little calcium chloride for a round finish.
- Mash at 148–150°F (64–66°C) for 60 minutes, for a dry, highly attenuated beer.
- Boil 90 minutes to drive off DMS from the Pilsner malt. Bitter with Hallertau, Tettnang or Spalt to about 20–25 IBU, with a small late addition. No dry hop.
- Chill to 58°F (14°C) and pitch plenty of healthy Kölsch yeast: WLP029, Wyeast 2565 or SafAle K-97. For liquid yeast in 5 gallons, a 1.5 L starter.
- Ferment at 60°F (16°C) for about 2 weeks, then let it rise to 64°F (18°C) for 2 days to clean up.
- Cold-condition near 34°F (1°C) for 3 to 4 weeks. Kölsch yeast is slow to drop, so give it time; gelatin or filtering helps if you want Cologne clarity.
- Carbonate to about 2.5 volumes of CO₂ and drink it fresh.
Our Kölsch recipe has the full grain bill and hop schedule, scaled from 5 to 30 gallons. The whole beer depends on holding 60°F for two weeks and then near-freezing for a month, which is easy in a jacketed Unitank with a glycol chiller.
Common Kölsch problems
| Problem | Likely cause | Fix |
|---|---|---|
| Fruity, like a pale ale | Fermented too warm | 58–62°F (14–17°C), measured in the beer, not the room |
| Sulphur smell | Normal for young Kölsch yeast | More time cold; it fades |
| Won’t clear | Powdery yeast | Longer cold conditioning, gelatin or filtering |
| Cooked corn | DMS from Pilsner malt | A 90-minute rolling boil with the lid off, then chill fast |
| Butter or butterscotch | Diacetyl | The 2-day rise to 64°F before cold conditioning |
| Harsh bitterness | Too many IBUs or hard, sulfate-rich water | 20–25 IBU and soft water |
How Kölsch is served
In a Cologne brewpub, Kölsch comes in a 0.2 L Stange, a narrow, straight glass. The waiter, the Köbes, carries them in a round tray called a Kranz and swaps your empty glass for a full one until you put your beer mat on top. Pencil marks on the mat keep the tally. The small glass is the point: every sip is cold and fresh. At home, serve it well chilled in a tall, narrow glass, and drink it young.
Frequently asked questions
Is Kölsch an ale or a lager?
An ale, because it’s fermented with top-fermenting ale yeast. It’s then cold-conditioned like a lager, which is why it tastes so clean.
How do you pronounce Kölsch?
Close to “kerlsh”, with the rounded German ö.
Can I brew it with lager yeast?
You’ll get a nice pale beer, but not a Kölsch. The soft fruitiness comes from the Kölsch ale strain.
How long does a Kölsch take?
About six weeks from brew day: two weeks fermenting, a couple of days warmer, then three to four weeks cold.
Is Kölsch a wheat beer?
No. It’s almost all Pilsner malt. The style allows some wheat, but most Cologne breweries use little or none.
Related guides
Our Kölsch recipe, ale vs lager fermentation, lagering, the diacetyl rest and the BJCP style guidelines.