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Marblehead Johnson

Name: Marblehead Johnson
Prep time: 70 min
Cook time: 60 min
Total time: 130 min
Yield: 115 liters
Cuisine: Homebrewing
Ingredients: 20 kg Albino Whale - Extra pale ale malt; 2 kg Chocolate Malt; 2 kg Flaked Oats; 2 kg Crystal Dark; 1 kg CaraMalt; 1.5 kg Maris Otter pale; 90 g Columbus Hops

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Method: All Grain
Style: Oatmeal Stout
Boil Time: 60 min
Batch Size: 115 liters (fermentor volume)
Pre Boil Size: 215 liters
Post Boil Size: 120 liters
Pre Boil Gravity: 1.029 (recipe based estimate)
Post Boil Gravity: 1.051 (recipe based estimate)
Efficiency: 70% (brew house)
Source: Paul
Calories: 168 calories (Per 12L)
Carbs: 16.9 g (Per 12L)

Created: Wednesday August 26th 2026

Original Gravity:

1.051

Final Gravity:

1.012

ABV (standard):

5.2%

IBU (tinseth):

37.2

SRM (morey):

31.9

Mash pH

5.3

Cost £

n/a

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Fermentables

Amount	Fermentable	PPG	°L	Bill %
20 kg	Pauls Malt - Albino Whale - Extra pale ale malt	36	1.69	70.2%
2 kg	Crisp Malting - Chocolate Malt2 kg Chocolate Malt	32.66	450	7%
2 kg	Flaked Oats2 kg Flaked Oats	33	2.2	7%
2 kg	Simpsons - Crystal Dark2 kg Crystal Dark	33	120	7%
1 kg	Simpsons - CaraMalt1 kg CaraMalt	34	14	3.5%
1.50 kg	Simpsons - Maris Otter pale1.5 kg Maris Otter pale	38	2.4	5.3%
28.50 kg / £ 0.00

Hops

Amount	Variety	Cost	Type	AA	Use	Time	IBU	Bill %
90 g	Charles Faram - Columbus90 g Columbus Hops		Leaf/Whole	17	Boil at 100 °C	60 min	37.2	100%
90 g / £ 0.00

Show Summary View

Mash Guidelines

Amount	Type	Start Temp	Target Temp	Time
160 L	Strike	72 °C	65 °C	60 min
90 L		75 °C	75 °C	10 min
Starting Mash Thickness: 3.65 L/kg

Other Ingredients

Amount	Name	Cost	Type	Use	Time
20 g	Calcium Chloride (dihydrate)		Water Agt	Mash	1 hr.
60 ml	CRS/AMS (6.3% HCl, 8.6% H2SO4)		Water Agt	Mash	1 hr.

Yeast

- Granvin

Amount:	1 Each	Cost:
Attenuation (avg):	75%	Flocculation:	Medium
Optimum Temp:	30 - 40 °C	Starter:	No
Fermentation Temp:	-	Pitch Rate:	0.35 (M cells / ml / ° P) 508 B cells required

£ 0.00 Yeast Pitch Rate and Starter Calculator

Priming

Method: co2 CO₂ Level: 1.65 Volumes

Target Water Profile

lazy goat

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
0	0	0	0	0	0
Mash Chemistry and Brewing Water Calculator

Last Updated and Sharing

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Brews

Public: Yup, Shared
Last Updated: 2026-08-27 13:14 UTC

Recipe costs can be adjusted by changing the batch size. They won't be saved but will give you an idea of costs if your final yield was different.

Cost for

Gallons

Cost by

Final Yield

	Cost £	Cost %
Fermentables	£
Steeping Grains (Extract Only)	£
Hops	£
Yeast	£
Other	£
Cost Per Barrel	£ 0.00
Cost Per Pint	£ 0.00
Total Cost	£ 0.00

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Amount	Variety	Cost	IBU	Bill %
90 g	Charles Faram - Columbus (Leaf/Whole) 90 g Columbus (Leaf/Whole) Hops		37.2	100%
90 g / £ 0.00