Blended Whisky is made from a blend of whiskies from different distilleries. Ireland, Canada, Japan all produce blends, yet the most renown manifestation of this whisky type comes in the form of Blended Scotch Whisky. The term denotes a blend of one or more Single Malt Scotch Whiskies with one or more Single Grain Scotch Whiskies from different distilleries.
The typical proportion is 60% grain to 40% malt. The degree of complexity and smoothness in the final blend depends on the percentage of malt. Each whisky used in the blending will normally have been matured for about 5 years, although many other longer-matured versions are also available on the market.
The term should not be confused with Blended (formely known as Vatted) Malt Scotch Whisky, which comprises only Single Malt Scotch Whiskies (100% barley), which have been distilled at more than one distillery.
The practice of blending Scots malts trace its origins back to the Victorian times. The original family-run distilleries did not have bottling facilities. They used to sell whole casks of whisky to bottlers, blenders and merchants who then combined the product of various distilleries, to craft a consistent "brand style".