After industry-wide consultation in 2004 and 2005, it was proposed to formally define the following five categories of Scotch Whisky:
Single Malt Scotch Whisky: a Scotch Whisky distilled at a single distillery (i) from water and malted barley without the addition of any other cereals, and (ii) by batch distillation in pot stills. It is also proposed that Single Malt Scotch Whisky should only be bottled in Scotland.
Single Grain Scotch Whisky: a Scotch Whisky distilled at a single distillery (i) from water and malted barley with or without whole grains of other malted or unmalted cereals, and (ii) which does not comply with the definition of Single Malt Scotch Whisky.
Blended Scotch Whisky: a blend of one or more Single Malt Scotch Whiskies with one or more Single Grain Scotch Whiskies.
Blended Malt Scotch Whisky: a blend of Single Malt Scotch Whiskies, which have been distilled at more than one distillery.
Blended Grain Scotch Whisky: a blend of Single Grain Scotch Whiskies, which have been distilled at more than one distillery.
One of these terms would appear as the sales description on every bottle of Scotch Whisky sold. More than likely you’ll see blended or single on the bottle you purchase.
The biggest distinction is tasted between single malts and blended scotches. You should definitely taste a difference between these two kinds.

