https://www.homebrewersassociation.org/homebrew-recipe/pickelhaube-festbier/
Ingredients:
7.0 lb (3.18 kg) Pilsner malt (63.6%)
4.0 lb (1.81 kg) Vienna malt (36.4%)
1.0 oz (28 g) Hallertau pellets, 4.8% a.a. (FWH, 90 min)
0.5 oz (14 g) Spalter pellets, 4.5% a.a. (10 min)
Bavarian or Munich lager yeast (2 L starter)
RO water treated with 1g/gallon calcium chloride
Specifications:
Original Gravity: 1.055 (13.5° P)
ABV: 5.90%
IBU: 21
SRM: 4.1
FG: 1.010 (2.5° P)
Boil Time: 90 minutes
Efficiency: 75%
Directions:
Mash in for a protein rest at 122° F (50° C) for 20 minutes. Pull your first decoction of about 9 quarts (9 L) and boil for 15 minutes. Add back to main mash and equalize at 150° F (66° C). Hold at that temperature for 60 minutes. Apply heat or boiling water to mash out at 168°F (76° C) for 10 minutes. Sparge, boil 90 minutes, and add hops at stated intervals. Chill and oxygenate when wort temperature falls below 80° F (27° C). Pitch a strong starter of yeast at 48° F (9° C). Fermentation temperature may be allowed to rise to 50° F (10° C). As fermentation slows, bring to 55° F (13° C) and hold three days for a diacetyl rest. When the gravity reaches 1.012 (3° P), crash to lager temperatures (35° F or 2° C) and lager the beer for two or three months (or until Oktoberfest).