Mint Julep is a cocktail that originated in the 18th century in Kentucky, and it is widely consumed throughout the American South. It contains bourbon, sugar syrup, water, crushed ice, and fresh mint leaves (usually spearmint). In the 18th century, Mint Julep was originally prescribed for stomach-aches, while bourbon was sometimes replaced with aged gin.
However, since 1938, it is associated with the Kentucky Derby as an official drink. The drink is prepared by muddling fresh mint with sugar and crushed ice until the mint releases its essential oils, and the cocktail is then topped with bourbon and water.