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Recipe Information edit

Details

Name: Black Forest Stout Brewer: cameron4887 Brew Date: 4/19/2015
  IBU Formula: Rager Units: standard Private: Yes

Boil

Boil Volume: 13 gal. Boil Length: 90 min. Target Volume: 10 gal.

Style

Name: Russian Imperial Stout Category: Stout - 13F Type: Ale

Notes

- STRIKE:  10.5 gals @ 170F
- MASH: @ 149F for 90 mins
- SPARGE: 6 gals @ 200F

BOIL:
- Pre-boil S.G. (total volume): 1.076
- Post-boil S.G.: 1.084 (picked up 8 points in the boil, as per usual, efficiency was about 75%)

BREW NOTES:
- Mash settled at about 148. I'm fine with this, as I want the beer to be a bit drier anyway, as the cherry flavor will then play a bigger role, as well as make the beer less viscous and easier to drink a whole pint of.

YEAST:
- Was going to use 1084, but ended up using Mangrove Jack's M79 Burton Union yeast, two 10-gram packs per carboy (rehydrated in 1.5 cups of 90F water ea. for 30 mins before pitching).

FERMENT: 
- 15-20 hours: 1.5" thick rocky krausen (not super-dense yet) and active airlock. Things look good. No lag to ferment start like some M79 reviews stated (odds are they underpitched for their O.G. or didn't rehydrate, resulting in underpitching anyway).
- 36 hours in: Crazy ferment. Both carboys blowing off through airlock, even though they were filled to below the start of the neck of the glass. Krausen is light brown and thick. Took off airlocks and put on blowoff tubes and a few drops of FermcapS. Fermometers reading 69F; perfect.
- 72 hours in: Down to 1.035. Blow-off subsided about 50-55 hours into ferment, now bubbling along nicely. Still at 69F. Will add cherry puree and dry hops in a few days I think. Gravity sample tastes good, but a tad bitter/ astringent. Finish flavor is of baker's chocolate (very nice). Sample is very drinkable (if a bit viscous), even at 1.035. 

"SECONDARY":
- 04/26/15: Added cherries & dry hops (split between two carboys) after 2/3 sugar depletion (2.5 lbs cherries per carboy and 1.5 ounces Willamette per carboy)
- Cherries were frozen, pitted black cherries. Put into bucket with water to cover fruit with 1 crushed Campden tablet per gallon of "must" (about 2 gals total, so 2 Campden tablets). Let sit overnight to off-gas, the added to carboys. Carboys then swirled to rouse yeast and mix in cherries, then purged with CO2.
- 12 hours after adding cherries: airlocks bubbling away (about once per second). Thankfully no blowoff.
4/29: 
- Left carboy (got more whole cherries, less juice) down to 1.026
   - quite tart and a bit astringent. May have to add some sugar or cocoa
- Right carboy (more juice, less whole cherries) down to 1.026 as well
   - less tart/ astringent, but still unbalanced. We'll have to see how it conditions.
TASTING NOTES:

Fermentables add

Variety Amount Color Potential SG Grist%  
British 2-row Pale18 lbs. 8 oz.2 °L1.0371.05156%
Roasted Barley4 lbs. 8 oz.300 °L1.0251.00814%
Chocolate Malt4 lbs. 8 oz.350 °L1.0341.01114%
White Wheat4 lbs.2 °L1.041.01212%
Crystal 1201 lbs. 8 oz.120 °L1.0331.0045%
Total 33 lbs.
77 SRM
  1.087    

Hops add

Hops Amount AA% Use Time Type IBU  
Williamette (Usa)3 oz.5Dry Hop7 day(s)Pellet0
Northern Brewer (Germany)2 oz.9Boil60 min.Pellet34
Northern Brewer (Germany)1 oz.9Boil30 min.Pellet14
Northern Brewer (Germany)1 oz.9Boil15 min.Pellet9
Williamette (Usa)3 oz.5Boil1 min.Pellet6
Total 10.00 oz.         63  

Yeasts add

Yeast Attenuation% Flocculation Min Temperature Max Temperature  
Mangrove Jack's M7980High66 °F70 °F

Miscs Add

Misc Type Amount Use Time  
Yeast NutrientOther2 tsp.Boil15 min.
Whirlfloc TabletFining2 tsp.Boil15 min.
Black CherryFlavor5 lbs.Secondary7 day(s)

Mash Information edit

Details

Name: Black Forest Stout Brewer: cameron4887 Brew Date: 4/19/2015
  Boil Volume: 13 gal. Units: standard Thermal Loss: 8°F
  Mash Efficiency: 75% Mash Method: single infusion Sparge Method: batch
  Grain Temp: 54 °F Initial Grist Ratio: 1.27 qt./lb. Absorption Rate: 0.10 gal./lb.

Notes

Mash Steps add

Step Name Type Length Target Temp Infusion Amount Infusion Temp Grist Ratio  
Saccharificationinfusion90 min.149.0 °F10.50 gal.171.3 °F1.27
Total   1 hour 30 min   10.50 gal. (runoff: 7.20 gal.)    

Sparge Steps add

Step Name Length Target Temp Water Amount Water Temp  
2nd Infusion15 min.170.0 °F5.80 gal.209.8 °F
Total 15 min   5.80 gal.    

Type

all-grain

OG

1.087
style
1.075 - 1.115

FG

1.017
style
1.018 - 1.030

Color

77 SRM
style
30 - 40

IBU

63
style
50 - 90

ABV

9.2%
style
8 - 12

Cal.

288
per 12oz.