Single grain whiskey is a type of whiskey made from a mash bill that primarily consists of grains other than malted barley. Common grains used include corn, wheat, and rye. Unlike single malt whiskey, which is made exclusively from malted barley at a single distillery, single grain whiskey can be produced at multiple distilleries and may include a mix of grains. This whiskey is typically distilled in column stills, which allows for a lighter and smoother spirit. It is often aged in oak barrels, contributing to its flavor profile. Single grain whiskey is popular in various regions, including Scotland and Ireland, and is enjoyed neat or in cocktails.