A blended malt Scotch is not a blend from one distillery, but rather a Scotch whisky made from different single malt whiskies made by several distilleries. The difference between a blended Scotch whisky and a blended malt Scotch whisky is that the former has grains other than malted barley, while a single malt, as per the name, is produced solely from this one grain.
There are various production methods as far as aging with the blended malt Scotch whiskies and various levels of quality, with some produced for mixing with soda or in elegant cocktails, while the finest are meant for sipping in a small snifter. Most of them, given their heritage, have a smoky, peaty character with notes of honey, roasted nuts and a touch of pepper and other spices.