American distilleries have made malts for a few decades, but until recently, the term “American single malt” didn’t mean much. After years of lobbying by producers and advocacy groups, the Tobacco Tax and Trade Bureau finally recognized American single malts as a distinct whiskey style. American single malts must be made from 100% malted barley and have to be mashed, distilled, and aged in the United States, among other requirements that dictate proofing and aging. But just like other styles of American whiskey, profiles can vary drastically due to distiller preferences and the climate. “I can't even imagine the challenges of making a single malt in the heart of Texas versus the Pacific Northwest,” says Shirghio.