The story
Stout began as a nickname for the strongest London porters, but Ireland made it its own. In 1759 Arthur Guinness signed a 9,000-year lease on a small brewery at St. James’s Gate in Dublin, at an annual rent of £45. He initially brewed ales before switching to porter, and by the 19th century Guinness was among the largest breweries in the world. Cork’s Beamish and Murphy’s added their own versions, and the dry Irish stout became a defining style.
The modern pint took shape in the 20th century. Irish stouts became drier and lighter over time, and in 1959 Guinness introduced a draught system using a blend of nitrogen and carbon dioxide, giving the beer its famously thick, creamy head.
What it tastes like
The roast is front and center: coffee, bittersweet dark chocolate and a dry, grainy bitterness that comes from roasted barley. Hop bitterness adds to the crisp, dry finish. When served on nitro, the body feels creamy and smooth even though the beer is fairly light, and the dense tan head lingers down the glass. Carbonated bottle versions taste sharper and more bitter. The color is black, with ruby highlights at the edges.
How it’s made
The signature ingredient is roasted unmalted barley, which delivers the dry, coffee-like roast. It’s combined with pale malt and often flaked barley, which helps build that famous creamy head. English or Irish hops such as East Kent Goldings provide bitterness. Fermentation uses a clean to lightly fruity ale yeast. For draught service, the beer is dispensed with a nitrogen blend through a restrictor plate that knocks gas out of solution, creating the cascade of tiny bubbles.
Fun fact
Guinness has a reputation as a heavy “meal in a glass,” but a pint of Guinness Draught has fewer calories than many lagers, largely because its alcohol content is only around 4.2%. The widget in Guinness cans, introduced in 1989, is a small nitrogen-filled plastic ball that releases gas when the can is opened, recreating the draught pour at home.