Russian Imperial Stout - Catherine

This is the third take at my Russian Imperial Stout. The goal here is to maximize coffee and dark chocolate notes (without adding those ingredients) and minimize bitter astringency. Using the Debittered Black Malt as a substitute for Roasted Barley in the last 15 minutes of the mash should aid in creating this flavor character. This is a ten gallon batch. I will be dropping a cup of medium color oak chips (soaked in bourbon) to the secondary of one of the carboys. The bourbon oaked version will be named Motorhead Overkill.

Russian Imperial Stout v2 Catherine

Imperial Stout (13 F)

Type: All Grain
Batch Size: 10.00 gal
Boil Size: 14.44 gal
Boil Time: 90 min
End of Boil Vol: 11.44 gal
Final Bottling Vol: 9.25 gal
Fermentation: Ale, Two Stage

Date: 03 Jun 2014
Brewer: Karl D. Larson
Asst Brewer:
Equipment: Grand Larsony (10 Gal/37.8 L) - All Grain
Efficiency: 83.00 %
Est Mash Efficiency: 91.3 %
Taste Rating: 30.0

Taste Notes:

Ingredients

Amt	Name	Type	#	%/IBU
21 lbs	Pale Malt (2 Row) US (2.0 SRM)	Grain	1	75.0 %
3 lbs	Oats, Flaked (1.0 SRM)	Grain	2	10.7 %
2 lbs	Chocolate Malt (350.0 SRM)	Grain	3	7.1 %
1 lbs	Caramel/Crystal Malt - 10L (10.0 SRM)	Grain	4	3.6 %
1 lbs	DINGEMANS DEBITTERED BLACK MALT (500.0 SRM)	Grain	5	3.6 %
2.00 oz	Nugget [13.00 %] - First Wort 60.0 min	Hop	6	44.0 IBUs
2.00 Items	Whirlfloc Tablet (Boil 15.0 mins)	Fining	7	-
2.50 oz	Nugget [13.00 %] - Boil 10.0 min	Hop	8	18.1 IBUs
1.0 pkg	Safale American (DCL/Fermentis #US-05) [50.28 ml]	Yeast	9	-
1.20 tsp	Yeast Nutrient (Primary 3.0 days)	Other	10	-

Gravity, Alcohol Content and Color

Est Original Gravity: 1.082 SG
Est Final Gravity: 1.017 SG
Estimated Alcohol by Vol: 8.7 %
Bitterness: 62.1 IBUs
Est Color: 38.4 SRM

Measured Original Gravity: 1.082 SG
Measured Final Gravity: 1.014 SG
Actual Alcohol by Vol: 9.0 %
Calories: 280.4 kcal/12oz

Mash Profile

Mash Name: Single Infusion, Medium Body, No Mash Out
Sparge Water: 7.86 gal
Sparge Temperature: 168.0 F
Adjust Temp for Equipment: FALSE

Total Grain Weight: 28 lbs
Grain Temperature: 72.0 F
Tun Temperature: 72.0 F
Mash PH: 5.20

Mash Steps

Name	Description	Step Temperature	Step Time
Mash In	Add 43.76 qt of water at 160.2 F	151.0 F	60 min

Sparge: Fly sparge with 7.86 gal water at 168.0 F

Mash Notes: Simple single infusion mash for use with most modern well modified grains (about 95% of the time).

Carbonation and Storage

Carbonation Type: Keg
Pressure/Weight: 12.54 PSI
Keg/Bottling Temperature: 45.0 F
Fermentation: Ale, Two Stage

Volumes of CO2: 2.3
Carbonation Used: Keg with 12.54 PSI
Age for: 30.00 days
Storage Temperature: 65.0 F