Black to very black, American-style imperial stouts typically have a high alcohol content. Generally characterized as very robust. The extremely rich malty flavor and aroma are balanced with assertive hopping and fruity-ester characteristics. Bitterness should be moderately high to very high and balanced with full sweet malt character . Roasted malt astringency and bitterness can be moderately perceived but should not overwhelm the overall character. Hop aroma is usually moderately-high to overwhelmingly hop-floral, -citrus or -herbal. Diacetyl (butterscotch) levels should be absent.
Origin: North American
Recommended Glassware: Goblet or Snifter
Original Gravity (ºPlato): 1.080-1.100 (19.5-23 ºPlato)
Apparent Extract/Final Gravity (ºPlato): 1.020-1.030 (4-7.5 ºPlato)
Alcohol by Weight (Volume): 5.5-9.5% (7-12%)
Bitterness (IBU): 50-80
Color SRM (EBC): 40+ (80+ EBC)
Sub-style guidelines used with permission of the Brewers Association, www.beertown.org.