A Rusty Nail is a classic cocktail made from just two main ingredients: Scotch whisky and Drambuie, a sweet, herbal liqueur. The drink is typically served over ice in an old-fashioned glass and can be garnished with a lemon twist. Its flavor profile combines the smoky notes of Scotch with the sweetness and complexity of Drambuie. The origins of the Rusty Nail date back to the mid-20th century, and it has remained popular in bars and restaurants. The drink is known for its smoothness and is often enjoyed as a sipping cocktail, appealing to those who appreciate the rich flavors of whisky.