Adjust water with calcium chloride (about 1 tsp. or 5 mL for a neutral water source) and minimal other minerals. Strike with 16 quarts (15.14 L) of 134°F (57°C) water to rest at 122°F (50°C) for 20 minutes.
Decoction #1: Pull a thick decoction of 1/3 of the mash with minimal liquid. Heat decoction to 152°F (67°C) and hold for 20 minutes in a separate vessel, then bring to a boil while stirring. Return decoction to the main mash to raise the temperature to approximately 150°F (66°C).
Decoction #2: Pull a thick decoction of 1/3 of the mash with minimal liquid and bring to a boil. Add back to the main mash to raise temperature to 168°F (76°C) for a 10-minute mash out.
Ferment for two weeks at 48–50°F (9–10°C). Raise to 54°F (18°C) for 24 hours, then cold crash to 35°F (2°C) and cold condition for two more weeks.