4.2 L/kg) at 148 °F (64 °C) and hold at this temperature for 90 minutes. Raise temperature to mash out and recirculate for 15 minutes then begin to run off to the boil kettle. Sparge with enough acidified water to collect 7 gallons (26.5 L) in the kettle and then boil for 90 minutes, adding hops as indicated. You may opt to add a kettle fining and yeast nutrients in the final 15 minutes of the boil.
After the boil is complete, give the wort a long stir and allow break to settle for 10 minutes before beginning chilling process. Chill wort to 51 °F (11 °C) and transfer to the fermenter. If using a liquid yeast strain, aerate the wort well and pitch the yeast. Ferment at 53 °F (12 °C) until signs of fermentation slow. Slowly raise temperature to 59 °F (15°C) and hold for one week. Dump the yeast or transfer to a purged secondary vessel with the dry hops. Remove hops after three days and lager near freezing (~36 °F/2 °C) for three weeks, cooling slowly if possible (don’t cold crash). Rack again and then bottle and prime or keg and force carbonate.