A hot day in September Beer Recipe | All Grain Bohemian Pilsener | Brewer's Friend
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A hot day in September

171 calories 17 g 12 oz
Beer Stats
Method: All Grain
Style: Bohemian Pilsener
Boil Time: 90 min
Batch Size: 10 gallons (fermentor volume)
Pre Boil Size: 12.56 gallons
Post Boil Size: 10 gallons
Pre Boil Gravity: 1.041 (recipe based estimate)
Post Boil Gravity: 1.052 (recipe based estimate)
Efficiency: 70% (brew house)
Calories: 171 calories (Per 12oz)
Carbs: 17 g (Per 12oz)
Created: Friday July 25th 2025
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Fermentables
Amount Fermentable Cost PPG °L Bill %
20 lb American - Pilsner20 lb Pilsner 37 1.8 100%
20 lbs / 0.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
0.75 oz Saphir0.75 oz Saphir Hops Pellet 2.9 Boil 90 min 4.78 9.1%
0.75 oz Sterling0.75 oz Sterling Hops Pellet 8.5 Boil 90 min 14.02 9.1%
2 oz Saphir2 oz Saphir Hops Pellet 2.9 Boil 20 min 7.22 24.2%
0.75 oz Sterling0.75 oz Sterling Hops Pellet 8.5 Boil 20 min 7.94 9.1%
1.50 oz Saphir1.5 oz Saphir Hops Pellet 2.9 Boil 10 min 3.24 18.2%
0.50 oz Sterling0.5 oz Sterling Hops Pellet 8.5 Boil 10 min 3.17 6.1%
1.50 oz Saphir1.5 oz Saphir Hops Pellet 2.9 Boil 0 min 18.2%
0.50 oz Sterling0.5 oz Sterling Hops Pellet 8.5 Boil 0 min 6.1%
8.25 oz / 0.00
 
Mash Guidelines
Amount Description Type Start Temp Target Temp Time
7.33 gal Protein Rest - Pull the first decoction when finished Temperature -- 125 °F 15 min
7.33 gal Beta Rest - Add the first decoction back, aiming for a temperature of 148F. Hold this rest for 30min, then pull the second decoction Decoction -- 148 °F 30 min
7.33 gal Alpha Rest - Add the second decoction back, aiming for a rest temperature of 158F. Hold at this temperature for 30min Decoction -- 158 °F 30 min
7.33 gal Mash Out - Raise the temperature to 167F and hold for 10min Temperature -- 167 °F 10 min
6.5 gal Sparge - Sparge as usual after mash Temperature -- 170 °F 30 min
Starting Mash Thickness: 1.75 qt/lb
 
Other Ingredients
Amount Name Cost Type Use Time
1.17 g Gypsum Water Agt Mash 1 hr.
1 g Salt Water Agt Mash 1 hr.
2.05 g Baking Soda Water Agt Mash 1 hr.
12.30 ml Lactic acid Water Agt Mash 1 hr.
0.50 tsp Irish Moss Fining Mash 10 min.
 
Yeast
Wyeast - Bohemian Lager 2124
Amount:
1 Each
Cost:
Attenuation (avg):
75%
Flocculation:
Medium
Optimum Temp:
48 - 58 °F
Starter:
Yes
Fermentation Temp:
56.5 °F
Pitch Rate:
1.5 (M cells / ml / ° P) 730 B cells required
0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 2.25 Volumes
 
Target Water Profile
Pilsen (Light Lager)
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
4 0 14 9 9 21
Mash Chemistry and Brewing Water Calculator
"A hot day in September" Bohemian Pilsener beer recipe by Len620. All Grain, ABV 5.26%, IBU 40.38, SRM 3.59, Fermentables: (Pilsner) Hops: (Saphir, Sterling) Other: (Gypsum, Salt, Baking Soda, Lactic acid, Irish Moss)
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  • Public: Yup, Shared
  • Last Updated: 2025-07-25 16:45 UTC
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