We can't think of any other topic that has caused so much confusion as Single Malt. Technically speaking, single malt scotch whiskey is just a single distillery product, not a single batch or single barrel product.
Single-grain Scotch whiskey differs only because it contains barley and other grains, usually wheat or corn. Again, single malt refers to products made in a single distillery, not products made from single grains. This should also better explain the single malt vs. blended debate.
THE MACALLANThe Macallan 18 Year Sherry Oak Scotch 750ml
ABERLOURAberlour 16 Year Scotch Whiskey