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American Porter and Stout / 20C

Imperial Stout

Certified Beer Server Candidate Style Profile

Official BJCP guideline sections attached for full style exploration.

Certification exam alignment
Certified Beer Server Certified Cicerone® Advanced Cicerone® BJCP Beer Judge Entrance Exam
Source
BJCP 2021 Beer Style Guidelines

Overall Impression

An intensely-flavored, very strong, very dark stout with a broad range of interpretations. Roasty-burnt malt with a depth of dark or dried fruit flavors, and a warming, bittersweet finish. Despite the intense flavors, the components need to meld together to create a complex, harmonious beer, not a hot mess – sometimes only accomplished with age.

Aroma

Rich, deep, complex, and often quite intense, with a pleasant blend of roast, fruit, hops, and alcohol. Light to moderately strong roast can have a coffee, bittersweet or dark chocolate, cocoa, black licorice, tar, or slightly burnt grain quality, sometimes with a light caramel sweetness or toasty maltiness. Low to moderately strong esters often perceived as dark or dried fruits like plums, prunes, figs, black currants, or raisins. Very low to fairly aggressive hops, often English or American in character. Alcohol flavor optional, but should not be sharp, hot, or solventy. The balance between these main four components can vary greatly; not all need to be noticeable, but those present should have a smooth interplay. Age can add another dimension, including a vinous or port-like impression, but not sourness. Age can decrease aroma intensity.

Appearance

Color ranges from very dark reddish-brown to jet black. Opaque. Deep tan to dark brown head. Generally has a well-formed head, although head retention may be low to moderate. High alcohol and viscosity may be visible as legs.

Flavor

Like the aroma, a complex mix of roast, fruit, hops, and alcohol (same descriptors apply). The flavors can be quite intense, often greater than in the aroma, but the same warning about the balance varying greatly still applies. Medium to aggressively high bitterness. The maltiness balances and supports the other flavors, and may have qualities of bread, toast, or caramel. The palate and finish can be fairly dry to moderately sweet, an impression that often changes with age. Should not by syrupy or cloying. Aftertaste of roast, bitterness, and warmth. Same age effects as in the aroma apply.

Mouthfeel

Full to very full-bodied and chewy, with a velvety, luscious texture. The body and texture may decline with age. Gentle, smooth warmth should be present and noticeable, but as a background character. Low to moderate carbonation.

Vital Statistics

IBU
50 - 90
SRM
30 - 40
ABV
8% - 12%

Commercial Examples

  • Bell’s Expedition Stout
  • Great Divide Yeti Imperial Stout

Similar Styles: How to Tell Them Apart

Use these guideline-based sensory contrasts to organize comparative tasting practice.

Both are black stouts with coffee, chocolate, roast, and bitterness, so color alone is not useful. The strength and body gap is decisive: Irish Stout is a session-strength, relatively simple roasted beer, while Imperial Stout is very strong, full, warming, and layered with dark fruit, alcohol, hops, and deeper roast.

Compare with: 15B. Irish Stout

By aroma

  • Imperial Stout is rich, deep, and often intense with roast, dark or dried fruit, hops, and alcohol, far broader than Irish Stout's moderate coffee-led roast profile.
  • Imperial Stout can suggest plums, prunes, figs, black currants, raisins, or age-derived vinous or port-like notes that are not part of Irish Stout's profile.
  • Imperial Stout may have light to moderately strong coffee, bittersweet chocolate, cocoa, licorice, tar, or slightly burnt grain, while Irish Stout's roast is typically coffee, cocoa, or roasted grain without the same intensity.

By taste

  • Imperial Stout is very strong at 8–12% ABV, with warming alcohol and a fuller, more intense flavor than the 3.8–5% ABV Irish Stout; this strength-body gap is a primary separator.
  • Imperial Stout can combine intense roast with dark fruit, hop flavor, alcohol, bread, toast, or caramel, whereas Irish Stout centers moderate coffee-like roast and a simpler bitter-to-dry balance.
  • Imperial Stout has medium to aggressively high bitterness and a roast, bitterness, and warmth aftertaste; Irish Stout may be bitter but should not have Imperial Stout's alcoholic, layered finish.

Quick tell: Alcohol warmth, dense body, and dark-fruit complexity identify Imperial Stout immediately.

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