Scotch whiskey is a whiskey that is distilled in Scotland. It is often a blend of malt and grain whiskeys and aged at least 3 years (4 years for exports) . Single malt scotch is made only from malted barley and no other grain, sugar, or fermentable material. They are made at the same distillery and not blended with any other scotch. Most single malt scotches are aged an average of 8 to 12 years.