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Maístjarnan

199 calories 18.9 g 330 ml
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Beer Stats
Method: All Grain
Style: Maibock/Helles Bock
Boil Time: 60 min
Batch Size: 47 liters (fermentor volume)
Pre Boil Size: 57.37 liters
Post Boil Size: 52 liters
Pre Boil Gravity: 14.5 °P (recipe based estimate)
Post Boil Gravity: 15.9 °P (recipe based estimate)
Efficiency: 67% (brew house)
Source: Bjórsetur Íslands Brugghús
Calories: 199 calories (Per 330ml)
Carbs: 18.9 g (Per 330ml)
Created: Thursday January 15th 2026
15.9 °P
3.5 °P
6.7%
23.8
9.7
5.6
4,690.00
 
Fermentables
Amount Fermentable Cost PPG °L Bill %
10.50 kg Weyermann - Pilsner10.5 kg Pilsner kr 230.00 / kg
kr 2,415.00 		36 1.5 70%
3 kg Weyermann - Vienna Malt3 kg Vienna Malt kr 320.00 / kg
kr 960.00 		37 3.5 20%
1.50 kg Weyermann - Munich Type I1.5 kg Munich Type I kr 370.00 / kg
kr 555.00 		38 6 10%
15 kg / kr 3,930.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
25 g Magnum25 g Magnum Hops kr 10.40 / g
kr 260.00 		Pellet 12 Boil 60 min 18.84 33.3%
25 g Perle25 g Perle Hops kr 10.00 / g
kr 250.00 		Pellet 5.5 Boil 20 min 2.93 33.3%
25 g Mt.Hood25 g Mt.Hood Hops kr 10.00 / g
kr 250.00 		Pellet 6 Boil 10 min 2.05 33.3%
75 g / kr 760.00
 
Other Ingredients
Amount Name Cost Type Use Time
6 g Gypsum Water Agt Mash 0 min.
4 g Calcium Chloride (dihydrate) Water Agt Mash 0 min.
8 ml Lactic acid Water Agt Mash 0 min.
 
Yeast
Mangrove Jack - Bavarian Lager M76
Amount:
2 Each
Cost:
Attenuation (avg):
77.5%
Flocculation:
Medium
Optimum Temp:
7 - 14 °C
Starter:
No
Fermentation Temp:
15 °C
Pitch Rate:
0.35 (M cells / ml / ° P) 261 B cells required
kr 0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 2.45 Volumes
 
Target Water Profile
Iceland - avarage
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
50 0 5 65 70 0
Mash Chemistry and Brewing Water Calculator
 
Mash Guidelines
Amount Description Type Start Temp Target Temp Time
40 L Strike 74 °C 67 °C 60 min
32 L Sparge 76 °C 76 °C 15 min
Starting Mash Thickness: 2.67 L/kg
Starting Grain Temp: 20 °C
Quick Water Requirements
Water Liters
WARNING: Boil kettle capacity (45.4 L) exceeded. Volume required: 53.08 L. Suggest reducing initial water volume to 45.4 L and adding 7.68 L sparge/top-off.  
WARNING: Mash tun capacity exceeded. Volume required: 49.95 L. Suggest reducing strike water volume to 35.5 L and adding 4.55 L sparge/top-off. 40.1
Strike water volume at mash thickness of 2.7 L/kg 40.1
Mash volume with grains 50
Grain absorption losses -15
Remaining sparge water volume (equipment estimates 28.9 L) 33.2
Mash Lauter Tun losses -0.9
Pre boil volume (equipment estimates 53.1 L) 57.4
Boil off losses -5.7
Hops absorption losses (first wort, boil, aroma) -0.4
Post boil Volume (equipment estimates 47 L) 52
WARNING: Exceeded batch size - reduce boil size  
Going into fermentor (equipment estimates 52 L) 47
Total: 73.3  
Equipment Profile Used: System Default
"Maístjarnan" Maibock/Helles Bock beer recipe by Bjórsetur Íslands Brugghús. All Grain, ABV 6.72%, IBU 23.82, SRM 9.65, Fermentables: ( Pilsner, Vienna Malt, Munich Type I) Hops: (Magnum, Perle, Mt.Hood) Other: (Gypsum, Calcium Chloride (dihydrate), Lactic acid)
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  • Public: Yup, Shared
  • Last Updated: 2026-01-17 20:12 UTC