Imperial Stout Recipe - Mothers Day Imperial Stout and a Half

Recipe Info

Recipe Image

Mothers Day Imperial Stout and a Half

by on
All Grain
5.75 Gallon(s)
6.5 Gallon(s)
75 min
75%
The MDIS was so good that I wanted to do it again, but I had a lot of problems trying to sparge over 22# of grain in a 5 gallon cooler lauter tun. So I decided to use a different technique (from "Radical Brewing", by Randy Mosher) in which I mash half the grain, lauter 4 gallons of it, and mash the other half in that. I'll then add 2# of 2-row, mash that, and make a lower-gravity stout.

This recipe was cloned from Mothers Day Imperial Stout.

Fermentables

77% - 2-Row - US
17
37
1
Mash
5% - Roasted Barley - US
1
25
300
Mash
5% - Flaked Barley - US
1
32
2
Mash
6% - Chocolate Malt - US
1.25
34
350
Mash
2% - Black Malt - US
0.5
28
500
Mash
2% - Crystal 120L - CA
0.5
33
120
Mash
3% - Rolled Oats - US
0.75
33
2
Mash
1% - Crystal 60L - CA
0.2125
34
60
Mash

Hops

Magnum
1
Pellet
FirstWort
75 min(s)
12.1
25.9
Sterling
1
Pellet
Boil
60 min(s)
8
16.4
Warrior
1
Pellet
Boil
15 min(s)
16.1
16.4

Yeast

Fermentis Safale US-05
75%

Other Stuff

Gypsum
3
tsp
Mash

Mash Steps

Overnight Rest
Infusion
135
180 min

Special Instructions

1.
Wet crush 1/2 the grain (not the flaked barley or rolled oats)
2.
Mash in the crushedgrain and ~1/2 the flaked barley and rolled oats with 4 gal of 167* F water and 1 tsp gypsum
3.
Next morning, lauter 4 gallons and set aside, keeping warm (167* F if possible).
4.
Lauter 2 more gallons and set aside.
5.
Clean out the lauter tun and mash the second half of the grain with the 4 gallons of wort.
6.
After an hour, lauter 6 1/2 gallons, first using the 2 gallons from the first batch, then water with 1 tsp gypsum.
7.
Bring to a boil and proceed as normal.
8.
Crush and mash 2# 2-row with the "spent" grain after raising the temperature as necessary.
9.
Lauter 6 gallons using 1tsp gypsum and proceed as normal.

Tasting Notes (0)

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Recipe Facts

Mothers Day Imperial Stout and a Half
Imperial Stout
  • 5.75 Gallons Liters Batch Size
  • 6.50 Gallons Liters Boil Size
  • 75  min Boil Time
  • 1.103 OG
  • 1.026 FG
  • 58.7 IBU (tinseth) Bitterness
  • 0.57 BG:GU
  • 55.2° SRM Color
  • 75% Efficiency
  • 10.0% ABV Alcohol
  • 366 per 12oz Calories
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