Whiskey has a bold and complex flavor. Whiskey cocktails include whiskey sours, mint juleps, and blackberry bourbon smashes. It is a type of distilled alcoholic beverage made from fermented grain mash. Various grains are used for different varieties, including barley, corn, rye, and wheat. Whisky is aged in wooden casks, which are typically made of charred white oak. Bourbon is a type of an American whiskey made using a corn-based mash.