Wayfinder Relapse Cold IPA

DIRECTIONS
For the cereal mash: Mix the rice flakes with 13 oz (813 g) of crushed malt and 9 quarts (8.5 litres) of 131°F (55°C) water. Once there are no clumps, cereal mash to 167°F (75°C) and rest 15 minutes for gelatinization, stirring the whole time. Continue stirring and bring to a boil; boil this decoction for 30 minutes.
While the cereal mash is boiling, mash in with the malt at 97°F (36°C) and rest there. Once the decoction is finished, carefully add it to the main mash, stirring rapidly, which should bring the whole mash to about 140–144°F (60–62°C). Raise the temperature to 144°F (62°C), if necessary, and rest 30 minutes. Raise the temperature to 154°F (68°C) and rest 30 minutes. Raise the temperature to 162°F (72°C) and rest for 15 minutes. Do an iodine test to ensure that starches have converted, then raise the temperature to 172°F (78°C) and mash out. Sparge and lauter as necessary to get about 6.8 gallons (26 liters) of wort—or more, depending on your evaporation rate.
Boil 90 minutes, adding hops according to schedule. Whirlpool and add the whirlpool hop additions when the wort temperature has dropped to about 190°F (88°C); continue whirlpooling for 20 minutes. Chill the wort to 48°F (9°C), aerate well, and pitch rehydrated yeast. Ferment at 65°F (18°C). When fermentation reaches about 1.012, move the wort to a pressure vessel (such as a keg; must have pressure relief and a safety valve), dry hop, and add 15 psi—via spunding valve, if possible. Once the beer reaches terminal gravity, crash to 30°F (-1°C), remove the yeast and hops, and condition 1 week before filtering and packaging.
BREWER’S NOTES
The pilsner malt should be American—high free-amino nitrogen, high diastatic power; German pilsner malts don’t work as well with adjuncts. For the rice, you could also experiment with skipping the cereal mash and using rice syrup instead of flakes. For the yeast, Kölsch or Chico strains could also work for a “cold IPA.”
We carbonate via spunding and I like that for IPAs; it seems like carb stones can strip away aromatics. So, we dry hop on spunding day, when kräusening with fresh-fermenting Czech pils. It works great: The added fermentation scrubs the oxygen from the dry hops, we get some biotransformation, and it completely carbonates the beer.