BIAB: Chocolate Stout

[injac]

Yesterday was a good brew day. Recipe courtesy of John_Drummer of this very forum. Only change was I used Northdown instead of Fuggles as had them in stock already.

Was aiming for 1.045 - got 1.043!

Style: Stout
Source Recipe Link:
ABV: 4.4% (assumes any priming sugar used is diluted.)

Original Gravity (OG): 1.045
IBU's (Tinseth): 31.6
Bitterness to Gravity Ratio: 0.7
Colour:

Kettle Efficiency (as in EIB and EAW): 82.6 %
Efficiency into Fermentor (EIF): 70.8 %

Times and Temperatures

Mash: 75 mins at 67 C = 152.6 F
Boil: 60 min
Ferment: 7 days at 20 C = 68 F

Volumes & Gravities

Total Water Needed (TWN): 27.94 L = 7.38 G
Volume into Boil (VIB): 25.5 L = 6.74 G @ 1.039
Volume of Ambient Wort (VAW): 21 L = 5.55 G @ 1.045
Volume into Fermentor (VIF): 18 L = 4.76 G @ 1.045
Volume into Packaging (VIP): 16.67 L = 4.4 G @ 1.011 assuming apparent attenuation of 75 %

The Grain Bill (Also includes extracts, sugars and adjuncts)

Note: If extracts, sugars or adjuncts are not followed by an exclamation mark, go to http://www.biabrewer.info (needs link)

75.9% Maris Otter (4.9 EBC = 2.5 SRM) 2931 grams = 6.46 pounds
11.2% Chocolate Malt 432 grams = 0.95 pounds
4.3% Flaked Oats 167 grams = 0.37 pounds
4.3% Torrefied Wheat 167 grams = 0.37 pounds
2.2% Black Roasted Barley 84 grams = 0.18 pounds
2.2% Cocoa Powder 84 grams = 0.18 pounds

The Hop Bill
29 IBU Northdown Pellets (8.1%AA) 28.3 grams = 0.998 ounces at 60 mins
2.6 IBU Northdown Pellets (8.1%AA) 7.1 grams = 0.25 ounces at 10 mins
0 IBU Northdown Pellets (8.1%AA) 7.1 grams = 0.25 ounces at 0 mins

Mash Steps

Mash Type: Pure BIAB (Full-Volume Mash): for 75 mins at 67 C = 152.6 F
Water Held Back from Mash: 2 L = 0.53 G

Water Used in a Sparge: 2 L = 0.53 G

Fermentation: Nottingham

Water Held Back from Mash: 2 L = 0.53 G
Water Used in a Sparge: 2 L = 0.53 G

[injac]

Checked on this today - plenty of bubbling but no krausen. It seems after reading online cocoa powder can be the reason for this - wonder if it will kill the head in the finished beer....?

[6470zzy]

Checked on this today - plenty of bubbling but no krausen. It seems after reading online cocoa powder can be the reason for this - wonder if it will kill the head in the finished beer....?

Cocoa does indeed contain fat which can be detrimental to head retention.

Cheers