Imperial Stout

Imperial Stout, often synonymous with Russian Imperial Stout, is a rich, full-bodied dark beer that stands as one of the heaviest and most robust styles available. Its history is anchored in 18th-century England where it was originally brewed to an elevated strength to prevent spoilage during the long shipment to Russia and the Baltic region, where it was favored by the court of Catherine the Great. More recently, it has seen a rise in popularity, when it became a favourite of the craft beer scene in both America and internationally.

Appearance-wise, Imperial Stouts boast an opaque jet-black color with a moderate to thick creamy tan or brown head. The retention of this foam can vary but is generally quite good due to the high protein content from its substantial grain bill. Legs are often noticeable when swirled due to its typically high alcohol content. Flavor and aroma profiles are complex and intense. Expect strong malt character featuring roasted grains which can produce flavors of coffee, chocolate, charred bread, and dark fruits such as prunes or raisins. Despite this malt complexity, some degree of hop bitterness is necessary for balance but should not overshadow the malt; however, some versions may have higher levels of hop flavor and aroma which can add another layer of complexity. The alcohol content ranges from strong to aggressive – usually around 8-12% ABV – contributing warmth that's often perceived on both the palate and nose without being sharp or solventy.

It shares several similarities with other stout substyles such as American Stout but markedly differs in alcohol strength and intensity of flavors. It also relates closely to barleywines due to its rich profile and higher alcohol content though differing significantly in roast character.