First, let’s take a little look at what exactly makes a whisky a whisky. In the simplest terms, whisky is a spirit made from distilling fermented mash from grains. In single malts, that’s usually barley, but when talking about all whisky, it can be corn, rye, wheat, and various other grains. Importantly, there are distinctions that separate some drams from others and these can often be attributed to geographical constraints.