Tara's Slam Dunkel (AHA)

Use a double decoction mash. Mash grains at 122° F (50° C) for 30 min. Use 1.25 qts/lb. Decoct 1/3 of mash (thick portion) and raise to 158° F (70° C). Rest for 20 min. Raise temp and boil for 20 min. Add to main mash and rest at 149° F (65° C) for 20 min. For second decoction, pull 1/3 of mash and raise to 158° F (70° C) for 20 min. Bring to boil and add to main mash to mash out at 167° F (75° C). Sparge with 167° F (75° C) sparge water treated with 1/2 tsp calcium carbonate to collect seven gallons. Boil for 90 min. Cool to 65° F (18° C) and add yeast to adequately aerated wort. Once visible signs of fermentations are observed reduce temp of fermentation to 55° F (13° C).

Primary fermentation for 14 days at 55° F (13° C).

Secondary fermentation for 3 weeks at 41° F (5° C).

Forced CO2 to carbonate (2.4 vol).