Cold IPA El Pachuco

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 (see On the Road to Conversion) 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.