Which ingredient is essential for making a traditional mojito?

The essential ingredient for making a traditional mojito is rum. A mojito is a classic Cuban cocktail that combines fresh mint leaves, sugar, lime juice, soda water, and, most importantly, white rum. The rum provides the distinctive base spirit that characterizes the drink and complements the refreshing flavors of mint and lime.

In contrast, the other options—whiskey, tequila, and vodka—are not traditional ingredients for a mojito and would result in entirely different cocktails. While other spirits can be used in various cocktails, the mojito specifically relies on rum to deliver its signature taste and make it a beloved drink.