REISSDORF KOLSH. Kölsch is a beer brewed in Cologne, Germany. It is clear with a bright, straw-yellow hue similar to a standard German pale lager. Kölsch is warm fermented at around 13 to 21 °C (55 to 70 °F), then conditioned by lagering at cold temperatures. This style of fermentation links Kölsch with some other central northern European beers such as the Altbiers of western Germany and the Netherlands.