Whiskey is a distilled alcoholic beverage made from fermented grain mash. The grains used can include barley, corn, rye, and wheat. The production process involves mashing the grains, fermenting the mixture, distilling it, and then aging it in wooden casks, typically made of oak. The aging process contributes to the flavor and character of the whiskey. There are several types of whiskey, including Scotch, Irish whiskey, bourbon, and rye whiskey, each with its own unique production methods and flavor profiles. The alcohol content of whiskey usually ranges from 40% to 50% by volume. Whiskey is enjoyed neat, on the rocks, or as a key ingredient in various cocktails.