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Guinness Foreign Extra Stout clone

5 gallons/19 L, all-grain; OG = 1.078; FG = 1.019; IBU = 40; SRM = 43; ABV = 7.5%

Ingredients:

13 lbs. (5.9 kg) 2-row pale ale malt
2 lbs. 2 oz. (0.96 kg) flaked barley
1.0 lb. (0.45 kg) roasted barley (500 °L)
11.33 AAU Challenger hops  (60 mins) (1.6 oz./46 g of 7% alpha acids)
Wyeast 1084 (Irish Ale) or White Labs WLP004 (Irish Ale) yeast (2 qt./2 L starter plus 0.5 qt/500 mL mini-starter)
2/3 cup corn sugar (for priming)

Step by Step:

Brew pale base beer  Mash flaked barley and 11 lbs. (5.0 kg) of pale malt for 60 minutes at 152 °F (67 °C) in 4.1 gallons (15 L) of water. Collect about 6 gallons (23 L) of wort and boil hard for 90 minutes, adding hops with 60 minutes left in boil. Shoot for a yield around 4 gallons (15 L). (Your SG should be around 1.093.) Cool wort, siphon to fermenter, aerate and pitch yeast from big starter. Ferment at 68 °F (20 °C).

Make stout coloring extract Mash  roasted barley and 2.0 lbs. (0.91 kg) of pale malt at 152 °F (67 °C) in 80 oz. (2.4 L) of water. Stir in CaCO3 until pH value is between 5.2 and 5.4. Mash for 45–60 minutes. Collect 1.5 gallons (5.7 L) of wort. Boil for 30 minutes to reduce volume to 1 gallon (3.8 L). Cool wort, siphon to 1 gallon (3.8 L) jug, aerate and pitch yeast. Ferment at 68–72 °F (20–22 °C).  Make stout  Combine beers in keg or bottling bucket.      — Chris Colby