Stouts and Porters

The Dark Family

Stouts and porters are the dark beers of the ale world. They share a common ancestor and overlap significantly in character, but each has evolved into distinct sub-styles with unique identities.

Porter: The Original Dark Beer

Porter emerged in 18th-century London as a blend of old and young ales. It became the first industrially produced beer style and dominated British brewing for over a century. Modern porters feature brown malt, chocolate malt, and moderate roast character (20-30 SRM) with a medium body and balanced bitterness (18-35 IBU). English brown porters are mild and malty; robust American porters are more assertive.

Dry Irish Stout

The iconic Guinness style. Dry stout features roasted barley (unmalted), which contributes sharp coffee-like roast and a dry, tannic finish. Despite its dark appearance, dry stout is a sessionable beer (4-5% ABV) with a surprisingly light body. The nitrogen widget in cans produces the characteristic creamy, cascading pour.

Sweet / Milk Stout

Sweet stout adds lactose (milk sugar), which is unfermentable by brewer's yeast. The residual sugar produces a sweeter, fuller-bodied stout with chocolate and caramel notes. ABV is typically 4-6%.

Oatmeal Stout

Oats (5-15% of the grain bill) add a silky, creamy mouthfeel that distinguishes oatmeal stout from other sub-styles. Flavor is smooth, moderately roasted, with coffee and chocolate notes and a velvety body.

Foreign Extra Stout

A stronger, more assertive stout (5.5-8% ABV) originally brewed for export to tropical climates. Higher alcohol and hop rates acted as preservatives during long sea voyages. FES has a more intense roast character and a firmer bitterness than domestic stout.

Imperial Russian Stout

The most powerful stout sub-style (8-12% ABV). Originally brewed in England for export to the Russian Imperial Court. Intensely complex: dark chocolate, espresso, dark fruit (fig, plum, raisin), warming alcohol, and massive body. Often barrel-aged in bourbon or whiskey casks, adding vanilla, coconut, and oak character.

Brewing Tips

• Use roasted barley (300-500 L) for Irish stout character
• Use chocolate malt (350-450 L) for porter character
• Add oats (flaked or malted, 5-15%) for creamy mouthfeel
• Add lactose (0.5-1 lb per 5 gal) for sweet stout
• Mash at 154-158 F for full body in strong stouts
• Cold-steep dark grains overnight in cold water to extract color and mild roast without harsh astringency