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15

Number of seconds it takes to correctly pour a half liter of beer so that a thick creamy head of foam is created, according to reporting by the New York Times. U.S. bars that specialize in craft beers are increasingly pouring them in the European style—i.e. so that a billowing head of foam sits on top. Foam, made up of bubbles of carbon dioxide, traps a great beer’s aromas so that they can be released slowly, magnifying the beer’s flavors.

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