Step by Step
For authenticity, this all-grain recipe employs a step mash coupled with a single decoction. Mill the grains, then mix with 3.0 gallons (11.2 L) of 142 °F (61 °C) strike water to reach a protein rest of 131 °F (55 °C). Hold for 10 min before raising the mash temperature to 144 °F (62 °C). Hold this temperature for 30 minutes. Again, raise the mash temperature to 160 °F (71 °C) and hold there for 40 min. Finally, remove 1⁄3 of your mash, thin, and boil for 10 min before adding the decoction back to the main mash.

Vorlauf until your runnings are clear, and lauter. Sparge the grains with 4.5 gallons (17 L) and top up as necessary to obtain 6.5 gallons (25 L) of wort. Boil for 90 minutes, adding hops at the times indicated. After the boil is complete, perform a 5-minute whirlpool and then rapidly chill the wort to slightly below fermentation temperature, which is 47 °F (8.5 °C) for this beer. Pitch yeast.

Maintain fermentation temperature of 47 °F (8.5 °C) for 3.5 weeks or until the completion of primary fermentation, whichever is later. Then, reduce temperature to 38 °F (3.5 °C) gradually by dropping the temperature one degree every 2 days and rest there for 1 week. Perform a similar drop in temperature until you reach 32 °F (0 °C) and lager for 3-4 weeks. Bottle or keg the beer and carbonate to approximately 2.5 volumes.