Commonly served in pubs throughout Ireland, England, and the United States, the Black and Tan is a drink that is equal parts stout and pale ale. The drink gets its name from the colors of the uniforms worn by the British police who fought the Irish Republican Army in the early 1920s. Not surprisingly, that time and those colors do not elicit fond memories for the Irish, so the drink is often called a Half-and-Half in Irish pubs.
Regardless of its moniker, the drink is prepared by filling a pint glass halfway with pale ale (one Irish favorite, Harp lager, gives a lighter touch). The ale should be poured into the glass slowly and against the side, to prevent a big head from forming. Once the beer has settled, the stout (usually Guinness) is slowly poured over the back of a spoon, which will help keep the darker beer from forming a head, and will also help to keep the beers in two distinct layers.
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