Single malt whisky Single malt whisky Single malt whisky is malt whisky from a single distillery, that is, whisky distilled from a fermented mash made with malted barley, as distinguished from unmalted grain. Single malts are typically associated with single malt Scotch, though they are also produced in various other countries. Under 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
Grant's Australia and the Far East. In 1915, a new law stated that the minimum maturation period for Scotch whisky was to be two years (today it is three). While this led to the ruin of many a Scotch whisky distillery, William Grant had kept a supply of aging whisky in stock and was able to ensure continued production. William Grant died in 1923 but by this time, the family business was well established. In 1963, William's great-grandson, Charles Gordon, oversaw construction of the Girvan grain distillery – now the world's second largest grain whisky producer. In 1979, Grant's UK sales