Single malt whisky is malt whisky from a single distillery.
Single malts are typically associated with single malt Scotch, though they are also produced in various other countries.[1] Under the United Kingdom's Scotch Whisky Regulations, a "Single Malt Scotch Whisky" must be made exclusively from malted barley (although the addition of E150A caramel colouring is allowed), must be distilled using pot stills at a single distillery, and must be aged for at least three years in oak casks of a capacity not exceeding 700 litres (150 imperial gallons; 180 US gallons).[2][3]
American whiskey has mostly copied the Scottish formula: "The adopted criteria for American single malt whisky specify that the product be a type of whisky that is mashed, distilled, and aged in the United States; is distilled entirely at one U.S. distillery; is distilled to a proof of 160 or less; is distilled from a fermented mash of 100 percent malted barley; is stored in oak barrels (used, uncharred new, or charred new) with a maximum capacity of 700 liters; and is bottled at not less than 80° proof. In addition, the criteria allow for the use of caramel coloring as long as its use is disclosed on the product label. The regulation will also allow the use of the term “Straight” for an American single malt whisky that is aged for at least two years."[4]
Murray
was invoked but never defined (see the help page).