What is the main herb used in a traditional Mint Julep?

The primary herb used in a traditional Mint Julep is mint. This classic cocktail, which originates from the southern United States, specifically features fresh mint leaves as a crucial ingredient. The process of making a Mint Julep usually involves muddling the mint with sugar and a splash of water or bourbon, which helps to release the mint's aromatic oils, providing the drink with its signature refreshing flavor.

While tarragon, parsley, and basil are all herbs used in various culinary applications and cocktails, they do not contribute to the distinctive taste profile or tradition of the Mint Julep, which is characterized by the bright and cool essence of mint. This unique flavor combination is what makes the Mint Julep a popular choice, particularly during the Kentucky Derby and in southern culture. Therefore, the emphasis on mint in the preparation of the drink is what solidifies its status as the main herb in this iconic cocktail.