The whiskey smash is a classic cocktail that has been around since the mid-19th century. It was a popular drink during the golden age of cocktails in the late 1800s and early 1900s, and has enjoyed a resurgence in popularity in recent years as bartenders and cocktail enthusiasts have rediscovered classic recipes. The drink is characterized by its refreshing taste and the combination of whiskey and mint, which creates a unique and complex flavor profile. The lemon juice adds a tartness that balances out the sweetness of the sugar or simple syrup.