BYO McQuaker’s Oatmeal Stout (orig)

McQuaker’s Oatmeal stout
(5 gallons/19 L, all-grain)
OG = 1.055 (13.5 °P)
FG = 1.016 (4.1 °P)
IBU = 28 SRM = 35 ABV = 5.1%

Ingredients
8.5 lb. (3.85 kg) Thomas Fawcett & Sons Maris Otter pale ale malt
(or similar English pale ale malt)
14.1 oz. (400 g) Great Western flaked oats 1 °L<
10.6 oz. (300 g) Briess Victory® malt 28 °L 10.6 oz. (300 g) Thomas Fawcett & Sons chocolate malt 350 °L
7.1 oz. (200 g) Thomas Fawcett & Sons roasted barley 500 °L 7.1 oz. (200 g) Thomas Fawcett & Sons crystal malt 85 °L
7.5 AAU Kent Goldings pellet hops (60 min.) (1.5 oz./42 g at 5% alpha acids) White Labs WLP002 (English Ale) or Wyeast 1968 (London ESB) yeast

Step by Step
Spread the flaked oats out on a cookie sheet and toast them in the oven around 300 °F (149 °C) until they begin to slightly color up and give off a nutty oatmeal cookie character. Mill all of the grains together and dough-in targeting a mash of around 1.5 quarts of water to 1 pound of grain (a liquor-to-grist ratio of about 3:1 by weight) and a temperature of 154 °F (68 °C). Hold the mash at 154 °F (68 °C) until enzymatic conversion is complete. Infuse the mash with near-boiling water while stirring or with a recirculating mash system raise the temperature to mash out at 168 °F (76 °C). Sparge slowly with 170 °F (77 °C) water, collecting wort until the pre-boil kettle volume is around 5.9 gallons (22.3 L) and a gravity of 1.046 (11.5 °P).

The total wort boil time is 60 minutes. Add the hops once the wort reaches a full boil and then start your timer. Add Irish moss or other kettle finings with 15 minutes left in the boil.

Chill the wort to 68 °F (20 °C) and aerate thoroughly. The proper pitch rate is two packages of liquid yeast or 1 package of liquid yeast in a 2-liter starter. Ferment at 68 °F (20 °C). When fermentation is finished, carbonate the beer to approximately 2 to 2.5 volumes.