Guinness Foreign Extra Stout clone

(5 gallons/19 L, all-grain)
OG = 1.075  FG = 1.021 IBU = 40  SRM = 40  ABV = 7.5%

Ingredients

12.5 lbs. (5.7 kg) pale ale malt
2 lbs. 4 oz. (1 kg) flaked barley
1 lb. 2 oz. (0.5 kg) roasted barley (500 °L)
11.9 AAU Challenger hops (60 mins) (1.7 oz./48 g of 7% alpha acids)
Wyeast 1084 (Irish Ale) or White Labs WLP004 (Irish Ale) yeast (2 qt./2 L starter)
2/3 cup corn sugar (for priming)

Step by Step:

Mash grains for 60 minutes at 152 °F (67 °C) in 5.2 gallons (19.6 L) of water. Collect about 6.5 gallons (24.6 L) of wort and boil for 90 minutes, adding hops with 60 minutes left in boil. Shoot for a yield around 5.25 gallons (20 L).  Cool wort, siphon to fermenter, aerate and pitch yeast from big starter. Ferment at 68 °F (20 °C). Rack to a keg and force carbonate or rack to a bottling bucket, add priming sugar, and bottle bucket.