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George and Aaron’s Pre-Prohibition Porter

Method: BIAB
Style: Pre-Prohibition Porter
Boil Time: 60 min
Batch Size: 5 gallons (fermentor volume)
Pre Boil Size: 6.29 gallons
Post Boil Size: 5.75 gallons
Pre Boil Gravity: 1.049 (recipe based estimate)
Post Boil Gravity: 1.054 (recipe based estimate)
Efficiency: 66% (brew house)
Source: Terry Downing
Hop Utilization: 85%
Calories: 250 calories (Per 500ml)
Carbs: 23.3 g (Per 500ml)

Created: Wednesday March 25th 2026

Original Gravity:

1.054

Final Gravity:

1.011

ABV (standard):

5.7%

IBU (tinseth):

27.4

SRM (morey):

34.1

Mash pH

5.3

Cost $

2.00

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Fermentables

Amount	Fermentable	Cost	PPG	°L	Bill %
9 lb	Rahr - Standard 2-Row9 lb Standard 2-Row		36.8	1.8	79.1%
12 oz	Briess - Roasted Barley12 oz Roasted Barley		33.1	300	6.6%
0.50 lb	Briess - Rye Malt0.5 lb Rye Malt		36.8	3.7	4.4%
8 oz	American - Caramel / Crystal 120L8 oz Caramel / Crystal 120L		33	120	4.4%
8 oz	Root Shoot Malting - Buck Naked Chocolate8 oz Buck Naked Chocolate	$ 4.00 / lb $ 2.00	30	350	4.4%
2 oz	German - Acidulated Malt2 oz German - Acidulated Malt		27	3.4	1.1%
182 oz / $ 2.00

Hops

Amount	Variety	Type	AA	Use	Time	IBU	Bill %
0.50 oz	Chinook0.5 oz Chinook Hops	Pellet	13	Boil	60 min	21.12	50%
0.50 oz	Willamette0.5 oz Willamette Hops	Pellet	5	Boil	30 min	6.24	50%
1 oz / $ 0.00

Show Summary View

Amount	Variety	IBU	Bill %
0.50 oz	Chinook (Pellet)	21.12	50%
0.50 oz	Willamette (Pellet)	6.24	50%
1 oz / $ 0.00

Other Ingredients

Amount	Name	Cost	Type	Use	Time
4 g	Calcium Chloride (dihydrate)		Water Agt	Mash	1 hr.
3 g	Gypsum		Water Agt	Mash	1 hr.

Yeast

Lallemand - LalBrew Diamond Lager

Amount:	1 Each	Cost:
Attenuation (avg):	80%	Flocculation:	High
Optimum Temp:	50 - 59 °F	Starter:	No
Fermentation Temp:	-	Pitch Rate:	0.35 (M cells / ml / ° P) 88 B cells required

$ 0.00 Yeast Pitch Rate and Starter Calculator

Priming

CO₂ Level: 2.75 Volumes

Target Water Profile

London (Porter, dark ales)

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
9	2	8	4	6	44
Mash Chemistry and Brewing Water Calculator

Last Updated and Sharing

Views

Brews

Public: Yup, Shared
Last Updated: 2026-03-25 22:54 UTC

System Default

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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