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Kolsch Bock

173 calories 14.9 g 12 oz
Beer Stats
Method: All Grain
Style: Kölsch
Boil Time: 60 min
Batch Size: 5.5 gallons (fermentor volume)
Pre Boil Size: 6.6 gallons
Post Boil Size: 6 gallons
Pre Boil Gravity: 1.048 (recipe based estimate)
Efficiency: 77% (brew house)
Hop Utilization: 98%
Calories: 173 calories (Per 12oz)
Carbs: 14.9 g (Per 12oz)
Created Wednesday July 15th 2020
1.053
1.009
5.7%
29.0
3.2
5.4
n/a
 
Fermentables
Amount Fermentable Cost PPG °L Bill %
9.50 lb German - Pilsner9.5 lb Pilsner 38 1.6 96%
0.40 lb German - Vienna0.4 lb Vienna 37 4 4%
9.90 lbs / 0.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
3 oz Saaz3 oz Saaz Hops Pellet 2.8 Boil 60 min 29 100%
3 oz / 0.00
 
Mash Guidelines
Amount Description Type Temp Time
4.26 gal Single infusion recirculating mash Infusion 149 °F 60 min
3.58 gal Fly sparge Sparge 174 °F 45 min
Starting Mash Thickness: 1.35 qt/lb
 
Other Ingredients
Amount Name Cost Type Use Time
2 g Gypsum Water Agt Mash 1 hr.
1 g Calcium Chloride (dihydrate) Water Agt Mash 1 hr.
5 ml Lactic acid Water Agt Mash 1 hr.
2 ml Lactic acid Water Agt Sparge 45 min.
1 each Whirlfloc Fining Boil 7 min.
 
Yeast
Wyeast - Kölsch 2565
Amount:
1 Each
Cost:
Attenuation (custom):
80%
Flocculation:
Low
Optimum Temp:
56 - 70 °F
Starter:
Yes
Fermentation Temp:
61 °F
Pitch Rate:
0.75 (M cells / ml / ° P) 205 B cells required
0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 0 Volumes
 
Target Water Profile
Balanced Profile
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
58.9 11 8 31.3 64.6 6.3
Cologne (boiled)
Ca 37
Mg 10
Na 25
SO4 70
Cl 35
HCO3 80
Mash Chemistry and Brewing Water Calculator
 
Notes
  • Brewed on 8/22/20
  • Mash water = 4.26 gallons (16.1 liters)
  • Sparge water = 3.58 gallons (13.6 liters)
  • Expecting pre-boil volume of 6.6 gallons (25 liters) or 6.86 gallons (25.9 liters) after 4% wort expansion, actually had 25.9 liters or 6.86 gallons.
  • Expecting mash efficiency of 83% (at expanded wort volume) which implies a pre boil gravity of 1.044. This is using grain father's mash efficiency calculator. Would be 80% on brewer's friend.
  • Mash temp settled right it at ~149F
  • Hit 12.0 plato pre boil gravity which converts to 1.048 vs. 1.044 target so 90% mash efficiency (87.6% on brewer's friend) vs. 83% expected.
  • Expecting to boil down to 6.0 gallons (after wort cools) so boil-off tool estimates 1.048 OG (now 1.053 with higher mash efficiency), Actual original gravity reading was 13.0 plato which converts to 1.053 vs 1.048 expected
  • After boil had ~6.21 gallons [23.5 liters] (expected 6.0 not expanded, 6.26 expanded) in the kettle and ~5.75 gallons made it into the fermenter.
  • Pitched yeast starter and set fermentation chamber at 61F, then slowly started ramping up on day 5 (Thursday night, Saturday brewday).
  • Packaged on 9/5/20, batch #46, FG was 1.008 (at 69F) which converts to 1.009 so 80% attenuation vs 75% avg. and 76% expected
  • Fill keg to 51.82 pounds = (1.009FG x 8.345 x 5 gallons) + 9.72 (empty keg weight + packaging hoses attached). Easily got 51.82 pounds.
  • Turned out stronger than style. So calling this one a Kolsch Bock.
Last Updated and Sharing
 
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Recipe QR Code
  • Public: Yup, Shared
  • Last Updated: 2020-09-05 21:32 UTC
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