The hybrid that drinks like a lager but ferments like an ale. From Köln, Germany. Built to be drunk fresh, in volume, from a 200ml stange.
Kölsch ferments warm (like an ale) but lagers cold (like a lager), producing a clean, lightly fruity character. The flavor profile is delicate — noble hop spice from Tettnang or Hallertau, light biscuit malt, faint pear ester. Every one of these flavors fades within weeks. There's nothing assertive to mask oxidation, so even mild staleness ruins the beer. Lightstrike is a major concern if packaged in clear or green glass.
Cold storage from the moment you buy it. Kölsch is one of the most fragile beer styles in terms of light exposure — the noble hops are highly photosensitive and will produce skunky 3-MBT compounds in under an hour of direct sunlight. Brown bottles or cans only; keep away from light.
Within 6-8 weeks. Past 3 months the delicate hop aromatics fade and the beer tastes flat. Best example: drink Kölsch in Köln, where the appropriate Reinheitsgebot specifies that only beers brewed within 50 km of Köln can use the name.
These breweries either specialize in Kölsch or produce notable examples: