American Imperial Oatmeal Stout #2

Method: All Grain
Style: Russian Imperial Stout
Boil Time: 60 min
Batch Size: 5.25 gallons (fermentor volume)
Pre Boil Size: 7.06 gallons
Post Boil Size: 5.5 gallons
Pre Boil Gravity: 1.082 (recipe based estimate)
Post Boil Gravity: 1.105 (recipe based estimate)
Efficiency: 65% (brew house)
Hop Utilization: 97%
Calories: 354 calories (Per 12oz)
Carbs: 39.5 g (Per 12oz)

Created: Friday November 3rd 2023

Cigar City Hunahpu Clone

OG: 1.128 FG: 1.042 ABV: 11.3% IBU: 78

The Abyss Clone

by fboyle

OG: 1.108 FG: 1.036 ABV: 9.4% IBU: 64

House Imperial Stout

by ChicoBrewer

OG: 1.120 FG: 1.025 ABV: 12.5% IBU: 61

Original Gravity:

1.105

Final Gravity:

1.031

ABV (alternate):

10.9%

IBU (tinseth):

74.9

SRM (morey):

50.0

Mash pH

5.5

Cost $

58.19

Fermentables

Amount	Fermentable	Cost	PPG	°L	Bill %
10 lb	Briess - Brewers Malt 2-Row10 lb Brewers Malt 2-Row	$ 1.14 / lb $ 11.40	37	1.8	41.3%
5.50 lb	Sugar Creek Malt - Pilsner5.5 lb Pilsner	$ 1.97 / lb $ 10.84	37.7	2	22.7%
3 lb	Sugar Creek Malt - Oats3 lb Oats	$ 2.03 / lb $ 6.08	28.8	3.5	12.4%
1.20 lb	The Swaen - BlackSwaen Chocolate B1.2 lb BlackSwaen Chocolate B	$ 2.69 / lb $ 3.23	34.5	338	5%
1.20 lb	Briess - Caramel Malt - 120L1.2 lb Caramel Malt - 120L	$ 2.69 / lb $ 3.23	34.5	120	5%
1.20 lb	Proximity - Roasted Barley1.2 lb Roasted Barley	$ 2.29 / lb $ 2.75	33	475	5%
0.60 lb	Weyermann - Carafa III0.6 lb Carafa III	$ 2.99 / lb $ 1.79	32	525	2.5%
1.50 lb	Simpsons - Golden Naked Oats1.5 lb Golden Naked Oats	$ 3.39 / lb $ 5.09	27	7	6.2%
24.20 lbs / $ 44.39

Hops

Amount	Variety	Cost	Type	AA	Use	Time	IBU	Bill %
1.60 oz	Yakima Valley Hops - Warrior1.6 oz Warrior Hops	$ 0.31 / oz $ 0.50	Pellet	17.7	Boil	60 min	74.87	100%
1.60 oz / $ 0.50

Show Summary View

Amount	Variety	Cost	IBU	Bill %
1.60 oz	Yakima Valley Hops - Warrior (Pellet)	$ 0.31 / oz $ 0.50	74.87	100%
1.60 oz / $ 0.50

Other Ingredients

Amount	Name	Cost	Type	Use	Time
4 g	Baking Soda		Water Agt	Mash	1 hr.
3 g	Calcium Chloride (anhydrous)		Water Agt	Mash	1 hr.
10 g	Chalk		Water Agt	Mash	1 hr.
2 g	Epsom Salt		Water Agt	Mash	1 hr.
2.50 g	Gypsum		Water Agt	Mash	1 hr.
2 g	Magnesium Chloride		Water Agt	Mash	1 hr.
1 each	Whirlfloc / 14 Each	$ 0.38 / each $ 0.38	Fining	Mash	10 min.
4 g	Ascorbic Acid / 1.6589 Ounces	$ 1.98 / oz $ 0.28	Water Agt	Mash	0 min.
5.44 ml	Lactic acid - 88% / 21.9971 Ounces	$ 0.81 / oz $ 0.15	Water Agt	Mash	0 min.
5 tsp	BSG - Fermax Yeast Nutrient	$ 0.00 / oz $ 0.00	Other	Boil	10 min.
$ 0.81

Yeast

Imperial Yeast - A10 Darkness

Amount:	1 Each	Cost:	$ 12.49 / each $ 12.49
Attenuation (avg):	71%	Flocculation:	Medium
Optimum Temp:	62 - 72 °F	Starter:	Yes
Fermentation Temp:	67 °F	Pitch Rate:	0.35 (M cells / ml / ° P) 173 B cells required

$ 12.49 Yeast Pitch Rate and Starter Calculator

Priming

Method: co2 Amount: 18.21 psi Temp: 68 °F CO₂ Level: 1.9 Volumes

Target Water Profile

London (Porter, dark ales)

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
100	5	35	60	50	265
Mash Chemistry and Brewing Water Calculator

Mash Guidelines

Amount	Type	Start Temp	Target Temp	Time
7.26 gal	Strike	169 °F	154 °F	60 min
3.08 gal	Sparge	168 °F	168 °F	15 min
Starting Mash Thickness: 1.2 qt/lb Starting Grain Temp: 65 °F

Quick Water Requirements

Water	Gallons	Quarts
Strike water volume at mash thickness of 1.2 qt/lb	7.26	29
Mash volume with grains	9.2	36.8
Grain absorption losses	-3.03	-12.1
Remaining sparge water volume (equipment estimates 2.83 g \| 11.3 qt)	3.08	12.3
Mash Lauter Tun losses	-0.25	-1
Pre boil volume (equipment estimates 6.81 g \| 27.2 qt)	7.06	28.2
Boil off losses	-1.5	-6
Hops absorption losses (first wort, boil, aroma)	-0.06	-0.2
Post boil Volume (equipment estimates 5.25 g \| 21 qt)	5.5	22
WARNING: Exceeded batch size - reduce boil size
Going into fermentor (equipment estimates 5.5 g \| 22 qt)	5.25	21
Total:	10.34	41.3
Equipment Profile Used:	System Default

Batch Performance

Efficiency:

Conversion: 81.4%

Pre-Boil: 69% 24.1 ppg

Ending Kettle: 67% 23.3 ppg

Brew House: 64% 22.3 ppg

Wort Volume:

5.5 Gallons

Expected 5.25 Gallons of fermentable wort.
Adjust your equipment profile and calibrate your equipment to dial this in.
Expected OG: 1.105
Actual OG: 1.098

Alcohol and Attenuation:

ABV: 11.39%

Apparent Attenuation: 80.6%
Actual FG: 1.019
Calories per 12oz 354 calories
Carbohydrates per 12oz 39.5 g

Amount Packaged:

4.7 Gallons

Great job! You get to enjoy the equivalent of:

12oz bottles: 50
Pints: 38

Latest Brew Log

Date	Days	Event	Gravity	Volume	pH	Temp	Updated	Comment
12/10/2023 1:39 AM about 1 year ago	+0	Mash Complete	1.082	7.26 Gallons	5.3		12/10/2023 1:39 AM about 1 year ago
12/10/2023 1:39 AM about 1 year ago	+0	Pre-Boil Gravity	1.082	7.1 Gallons	5.3		12/10/2023 1:39 AM about 1 year ago
12/10/2023 3:12 AM about 1 year ago	+0	Boil Complete	1.098	5.75 Gallons	5.6		12/10/2023 3:12 AM about 1 year ago
12/10/2023 3:12 AM about 1 year ago	+0	Brew Day Complete	1.098	5.5 Gallons	5.6	67 °F	12/10/2023 3:12 AM about 1 year ago
12/11/2023 3:31 AM about 1 year ago	+1	Other					12/11/2023 3:31 AM about 1 year ago	Since I didn't make a starter, about 22 hours after single packet yeast pitch, I added 1 teaspoon of BSG Fermax yeast nutrient and opened the lid and stirred for around 30 seconds to add additional oxygen for yeast health. Just before doing this, fermentation was already quite active.
12/20/2023 2:11 AM about 1 year ago	+10	Other				68 °F	12/20/2023 2:11 AM about 1 year ago	Turned off temp control cooler.
12/20/2023 11:17 PM about 1 year ago	+10	Sample	1.021		4.8	68 °F	1/14/2024 6:27 AM 11 months ago	Beer is quite bitter. Same as last year's IBU target, but next time maybe drop IBU target to 60-ish. We'll see as it ages.
1/11/2024 2:20 AM 11 months ago	+32	Other					1/14/2024 6:23 AM 11 months ago	Add 2 oz. medium toast American oak chips that were soaked at room temp in Woodford Reserve Double Oaked bourbon (3 or 4 oz, I can't remember). Entire contents added in nylon strainer bag while purging fermenter with CO2.
1/15/2024 4:54 AM 11 months ago	+36	Tasting Note					1/15/2024 4:54 AM 11 months ago	Oak/bourbon flavor/aroma is still very mild. Leave in another few days and re-taste. Beer tastes less bitter than initial sampling.
1/23/2024 2:49 AM 11 months ago	+44	Fermentation Complete	1.019		4.8		1/23/2024 2:54 AM 11 months ago	Taste today after letting it sit on bourbon-soaked oak chips was way smoother than previous sampling. (More than 1 quart blew out the blow-off tube during vigorous fermentation.
1/23/2024 2:54 AM 11 months ago	+44	Packaged	1.019	4.7 Gallons	4.8		1/23/2024 2:54 AM 11 months ago	Split into two 2.5-gal kegs. One will receive CO2, one will be put on nitro.
2/12/2024 2:37 AM 10 months ago	+64	Tasting Note					2/12/2024 2:37 AM 10 months ago	Solid beer. Next time consider adding more oak chips/bourbon as the flavor is quite mild, but very enjoyable.

Notes

3rd recipe iteration. Changed flake oats to Sugar Creek malted oats and added 1.5 lb Naked Golden oats.
Vanilla, coffee, oak, or bourbon would be great additions.
The roasted barley is actually from Sugar Creek Malt, but isn't in Brewer's Friend software.

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Last Updated: 2023-12-09 22:00 UTC