Single-Step Mash: 4 qt. 172F water, add crushed grain, stir, stabilize, and hold temp at 156F for 60'. Lauter and sparge with 2 gallons of 170F water. Top off to 3 gal total volume for wort. Add Malt Extract and Bittering hops (Perle and Saaz) and boil for a total of 60 minutes.
After 30 minutes, add flavor hops (Tattnanger) . After 50 minutes, add Irish Moss. After 60 minutes, turn off heat, add aroma Hops (Hallertauer) and steep 3-5 minutes.
Strain and sparge hops and add hot wort to sanitized fermenter with 2 gallons of cold water. Chill to 70F and aerate wort. Pitch Primary yeast (Kolsch) and fertment at 55-60F for 4-7 days. Transfer to secondary, pitch secondary yeast (Danish Lager), and lager at 50F for no less than 3 weeks.
Prime and bottle, or keg and pressurize. Condition finished beer at 60F.
Adapted from Papazian (1997) "Homebrewers' Gold": Stoddard's Kolsch