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Polar Bear Killer Imperial Stout

Method: All Grain
Style: Imperial Stout
Boil Time: 60 min
Batch Size: 18 liters (fermentor volume)
Pre Boil Size: 26.74 liters
Pre Boil Gravity: 1.066 (recipe based estimate)
Post Boil Gravity: 1.098 (recipe based estimate)
Efficiency: 70% (brew house)
Calories: 325 calories (Per 12oz)
Carbs: 30 g (Per 12oz)

Created: Monday October 17th 2022

Original Gravity:

1.098

Final Gravity:

1.020

ABV (standard):

10.2%

IBU (tinseth):

49.0

SRM (morey):

50.0

Mash pH

5.5

Cost $

38.10

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Fermentables

Amount	Fermentable	Cost	PPG	°L	Bill %
5 kg	Crisp Malting - Extra Pale Maris Otter5 kg Extra Pale Maris Otter	$ 3.00 / kg $ 15.00	37.5	2	62.3%
1 kg	Crisp Malting - Roasted Barley1 kg Roasted Barley	$ 4.00 / kg $ 4.00	31.28	520	12.5%
400 g	Viking - Caramel 100400 g Caramel 100	$ 4.00 / kg $ 1.60	35	50.8	5%
400 g	Castle Malting - Château Arome400 g Château Arome	$ 4.00 / kg $ 1.60	34.4	39.8	5%
400 g	Brown Sugar400 g Brown Sugar	$ 2.00 / kg $ 0.80	45	15	5%
60 g	Crisp Malting - Chocolate Malt60 g Chocolate Malt	$ 3.00 / kg $ 0.18	32.66	450	0.7%
640 g	Castle Malting - Château Biscuit640 g Château Biscuit	$ 4.00 / kg $ 2.56	35	17	8%
120 g	Crisp Malting - Crystal 60L120 g Crystal 60L	$ 3.00 / kg $ 0.36	33.1	60	1.5%
8,020 g / $ 26.10

Hops

Amount	Variety	Cost	Type	AA	Use	Time	IBU	Bill %
15 g	Charles Faram - Northdown15 g Northdown Hops		Pellet	7.5	Boil	15 min	6.84	27.3%
20 g	Charles Faram - Fuggles20 g Fuggles Hops	$ 0.10 / g $ 2.00	Pellet	5.5	Boil	30 min	10.35	36.4%
20 g	Charles Faram - Chinook20 g Chinook Hops		Pellet	13	Boil	60 min	31.84	36.4%
55 g / $ 2.00

Show Summary View

Amount	Variety	Cost	IBU	Bill %
15 g	Charles Faram - Northdown (Pellet) 15 g Northdown (Pellet) Hops		6.84	27.3%
20 g	Charles Faram - Fuggles (Pellet) 20 g Fuggles (Pellet) Hops	$ 0.10 / g $ 2.00	10.35	36.4%
20 g	Charles Faram - Chinook (Pellet) 20 g Chinook (Pellet) Hops		31.84	36.4%
55 g / $ 2.00

Mash Guidelines

Amount	Description	Type	Start Temp	Target Temp	Time
19.5 L	1st mash (3.95kg)	Batch Sparge	70 °C	65 °C	60 min
	2nd mash (3.95kg)	Batch Sparge	70 °C	65 °C	60 min
7.5 L	3.5l after each mash.	Sparge	71.2 °C	71 °C	20 min
Starting Mash Thickness: 3.65 L/kg Starting Grain Temp: 22 °C

Other Ingredients

Amount	Name	Type	Use	Time
4 g	Calcium Chloride (dihydrate)	Water Agt	Mash	1 hr.
2 g	Baking Soda	Water Agt	Mash	1 min.
100 g	Rasin	Flavor	Boil	30 min.
200 g	Apricot Dried	Flavor	Boil	30 min.
100 g	Sweet Cherries	Flavor	Boil	30 min.
25 g	Whole Cloves	Spice	Boil	30 min.
1 each	Vanilla Bean	Flavor	Boil	30 min.
30 g	Cinnamon	Spice	Boil	30 min.

Yeast

Wyeast - London Ale 1028

Amount:	1 Each	Cost:	$ 10.00 / each $ 10.00
Attenuation (avg):	75%	Flocculation:	Med-Low
Optimum Temp:	16 - 22 °C	Starter:	No
Fermentation Temp:	-	Pitch Rate:	0.35 (M cells / ml / ° P) 147 B cells required

$ 10.00 Yeast Pitch Rate and Starter Calculator

Priming

Method: BrownSugar Amount: 63.8 g Temp: 20 °C CO₂ Level: 1.65 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

Notes

The double mash worked a treat. Conversion on the first mash was very high, higher than predicted. The second mash was conducted in the wort from the first mash.
OG was slightly over corrected to 1.094. The beer came out around 9,4% abv.
I made no calculations with the spices really, just went on flavour profile from my Winter Spiced Brown Ale which turned out perfect.
Long brew day but no complications. The yeast was a little past its best before but handled the fermentation despite the high gravity.

The beer was opened for the first time after three and a half weeks in the bottle, too soon? No. The beer has very good carbonation, lack of foam stability but with my experience with high gravity beers I'm not surprised.
The beer is perfectly balanced and tastes like an imperial stout, the fruit cake/Christmas cake flavours are there and this beer is worthy of a competition entry, I wonder how good this beer will be with age!
Boozy and strong, nice sweetness balanced with some bitters. Spice and malty flavours.

Last Updated and Sharing

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Public: Yup, Shared
Last Updated: 2023-01-23 16:28 UTC

System Default

Recipe costs can be adjusted by changing the batch size. They won't be saved but will give you an idea of costs if your final yield was different.

Cost for

Gallons

Cost by

Final Yield

	Cost $	Cost %
Fermentables	$
Steeping Grains (Extract Only)	$
Hops	$
Yeast	$
Other	$
Cost Per Barrel	$ 0.00
Cost Per Pint	$ 0.00
Total Cost	$ 0.00

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