Formerly known as vatted, or pure malt, a blended Scotch whisky is simply a blend of single malt whiskies from different distilleries, not to be confused with blended Scotch, whose blends will also include grain whisky.
Definition.
These were amongst the new definitions given by the Scotch Whisky Regulations in 2009 and was prompted by Diageo's attempt to re-name their single malt, Cardhu to Cardow and to blend it with other Speyside whiskies from Diageo, due to their running low of Cardhu single malt, such was the high demands at the time.
An outcry from competing brands and whisky connoisseurs meant Diageo had to do a 'u-turn' and Cardhu keeps it's name to this day.
There are many famous blended malt whiskies from Scotland, some now very familiar sights in bars and drinks cupboards throughout the world, including Monkey Shoulder, the range from Compass Box and to the lesser known brands of Sheep Dip and Glenalmond, each with their own distinct character and taste.