Single Malt Scotch is single malt whisky made in Scotland using a pot still distillation process at a single distillery, with malted barley as the only grain ingredient.
As with any Scotch whisky, a single malt Scotch must be distilled in Scotland and matured in oak casks in Scotland for at least three years (most single malts are matured longer).
“Malt” indicates that the whisky is distilled from a “malted” grain. Several types of grains can be malted (for example, barley, rye and wheat are all grains which can be malted); however, in the case of single malt Scotch, barley is always the only grain used.
“Single” indicates that all the malts in the bottle come from a single distillery. Bottles containing malt whisky from multiple distilleries are called “blended malt”.