Imperial Stout development

[OkanaganMike]

Hey folks, I'm trying to develop my own spin on an Imperial Stout and wonder if you folks could review it and give me any feedback from the members' vast experience.

Imperial Stout
Method: BIAB Style: Imperial Stout
Boil Time: 60 min Batch Size: 5.5 gallons (fermentor volume)
Boil Size: 7.5 gallons Efficiency: 75% (brew house)
Boil Gravity: 1.065 (recipe based estimate)
Original Gravity:1.089Final Gravity:1.025ABV (standard):8.37%IBU (tinseth):70.08SRM (morey):46.8

Fermentables
Amount Fermentable PPG °L Bill %
13 lb Canadian - Pale 2-Row 36 1.75 69.3%
2 lb American - Munich - Light 10L 33 10 10.7%
1.5 lb American - Chocolate 29 350 8%
1 lb American - Caramel / Crystal 120L 33 120 5.3%
1 lb Belgian - Biscuit 35 23 5.3%
4 oz American - Black Malt 28 500 1.3%

Hops
Amount Variety Type AA Use Time IBU
1 oz Cascade Pellet 5.5 Boil 60 min 16.57
1 oz Northern Brewer Pellet 7.8 Boil 60 min 23.5
0.5 oz Chinook Pellet 13 Boil 30 min 15.05
1 oz Perle Pellet 8.2 Boil 20 min 14.96
Mash Guidelines
Amount Description Type Temp Time
-- -- 156 F 60 min
Other Ingredients
Amount Name Type Use Time
1 each Whirlfloc Fining Boil 15 min
Yeast
Wyeast - British Ale 1098
Attenuation (avg): 74% Flocculation: Med-High
Optimum Temp: 64 - 72 °F Starter: Yes

Notes
**SUBSTITUTE DOUBLE ROASTED CRYSTAL FOR CRYSTAL 120**

2 Ltr yeast starter 48hrs before brew day (24-36 for fermenting and at least 12 to cold crash)

Sacc rest 156F for 60 mins
Mash out 168F for 10mins
60 min boil
Ferment at 67-69F 10days
Transfer to Secondary. Add 12shots (approx 12 fl oz.) hot pressed Espresso. Let sit 7-10 days



This recipe has been published online at:
http://www.brewersfriend.com/homebrew/recipe/view/405643/imperial-stout

Generated by Brewer's Friend - http://www.brewersfriend.com/
Date: 2016-10-07 16:13 UTC
Recipe Last Updated: 2016-10-07 16:12 UTC

 

[cyanmonkey]

Drop the Perle and move the Chinook later in the boil...15 minutes, or so.

Why are you bittering with two different strains? Why not go with a higher alpha variety? Magnum, or make it all Chinook?

Malt bill looks ok.

 

[OkanaganMike]

Drop the Perle and move the Chinook later in the boil...15 minutes, or so.

Why are you bittering with two different strains? Why not go with a higher alpha variety? Magnum, or make it all Chinook?

Malt bill looks ok.

Thanks for the input cyanmonkey. I'm new to the development side of brewing and trying to get my head around hop usage. I've benchmarked a lot of other recipes and found some that have a similar bittering schedule and thought it would give a more complex flavor profile. Maybe? Maybe not? You think not?

 

[cyanmonkey]

I'm not a big Perle guy. I like piney American hops in stouts, like Chinook or even Simcoe.

I'd go with a single high alpha hop addition because it's less hop matter in the kettle you have to deal with.

It's about preference.

 

[MapleGroveAleworks]

Google Building a Behemoth and read the article on grain bill percentages of commercial RIS and award winning homebrew recipes. It's very informative