Brewing process (Decoction Mash):
Mash-in: Dough-in the crushed malt with strike water to achieve a mash temperature of 99°F (37°C). Hold for 15 minutes. This is a crucial step for traditional Czech lagers, promoting enzymatic activity and flavor development.
Decoction #1: Pull roughly 1/3 of the mash volume and heat it to 150°F (66°C), resting for 15-20 minutes.
Boil Decoction #1: Bring the decoction to a full boil for 15 minutes, stirring continuously to prevent scorching.
Combine and Rest #1: Return the boiled decoction to the main mash, raising the temperature to 125°F (52°C). Rest for 15-30 minutes.
Repeat Decoction #2 & Rest #2: Repeat steps 2-4, aiming to raise the main mash temperature to 149°F (65°C) and resting for 30-60 minutes.
Repeat Decoction #3 & Rest #3: Repeat steps 2-4, raising the mash to 170°F (77°C) and resting for 10-15 minutes. This is the mash-out step, stopping enzymatic activity.