Firestone Walker Another Life Cold IPA

Mill the grains and mash at 145°F (63°C) for 45 minutes; raise to 154°F (68°C) and rest for 15 minutes; then raise to 162°F (72°C) and rest for 15 minutes. Mash out at 169°F (76°C).

Recirculate until the runnings are clear, then run off into the kettle. Sparge and top up as necessary to get about 6 gallons (23 liters) of wort, depending on your evaporation rate.

Boil for 70 minutes, adding hops according to the schedule. At the end of the boil, stir or pump to create a whirlpool, add whirlpool hops, and allow to steep 20 minutes. After the whirlpool, chill to about 56°F (13°C). Oxygenate the wort and pitch the yeast.

Ferment at 59°F (15°C), then raise to 64°F (18°C) for a diacetyl rest when the gravity has dropped to about 1.024. At terminal gravity, dump the yeast or rack to secondary and add the dry hops.

After 3 days, remove the hops or rack again. Chill to 31–32°F (0°C) over 2–3 days. Once cold, fine, centrifuge, or filter to clarify. Package and carbonate to about 2.6 volumes of CO2.

BREWER’S NOTES
Water: We use reverse-osmosis (RO) water and add minerals to target about 90 ppm of calcium, with a 2:1 ratio of gypsum to calcium chloride. We target a mash pH of 5.4 by adding phosphoric acid, then we adjust the wort to pH 5.1 at the end of the boil.
Enzymes: If you take the all-malt option, you can try adding amyloglucosidase to the mash to increase fermentability to levels comparable to the more diastatic North American malts.
Adjuncts: If you feel like using flaked corn instead of rice or want to try a cereal mash with corn grits or brewer’s rice, go for it! In the end, we’re just looking for a clean, dry IPA with a very light malt character.