Horseradish is a pungent, spicy root vegetable that is typically grated and used as a condiment. In the context of alcohol and cocktails, horseradish is most famously used in the Bloody Mary, where it adds a distinctive heat and sharpness. The strong, peppery flavor of horseradish pairs well with savory ingredients like tomato juice, Worcestershire sauce, and vodka. It can also be used in other savory cocktails and infusions to add a bold, spicy kick. Horseradish's intense flavor requires careful balancing, making it a unique ingredient that can elevate certain cocktails with its fiery profile.