What is the main ingredient in a traditional Martini?

The traditional Martini primarily consists of gin, making it a classic cocktail known for its simplicity and elegance. The combination of gin and dry vermouth, often garnished with an olive or a twist of lemon, defines this iconic drink. Gin brings herbal and botanical flavors, which contribute to the Martini's distinctive character. While vodka has become a popular variation in more contemporary interpretations, the gin version remains the hallmark of the original recipe, recognized for its crisp and refreshing taste.

In contrast, rum and tequila are not traditional components of a Martini; instead, they are used in different cocktails that showcase their own unique flavors and styles. Thus, gin stands out as the proper and essential ingredient for a traditional Martini.