Ask the Expert: What is Whiskey Made From?

In our new Ask the Expert series, Paste readers chime in with some of their most pressing booze concerns, and we do our best to help you make sense of it all. Resident expert Jake Emen has spent years on the road traveling to distilleries across the country and around the world, and he’s here to help. Want your own question answered? Send a Tweet to him @ManTalkFood using #AskTheExpert.
Ask the Expert: What is whiskey made from?
Ah, the water of life. Whiskey. That magical elixir we all love so much and hold so near and dear to our hearts. What in the world is it made from? It only takes three magical ingredients to get the job done.
Water: It is the water of life after all. Can’t get around good old H2O. The qualities of the water itself can end up affecting the final outcome, for instance, as is the case with Kentucky’s famed limestone water supply.
Grain: The grains which make up a whiskey constitute its mash bill—so known because the grains will be mashed, i.e., steeped in hot water, before being fermented. Different types of whiskeys use different types of grains. For example, single malt Scotch consists of only malted barley, while bourbon must be made with at least 51% corn, and then can include other grains such as rye, wheat, and malted barley.
Speaking of fermentation though, that brings us to magical ingredient number three…