Which ingredient is used to garnish a Caesar?

The garnish used for a Caesar cocktail is the extreme bean, which typically refers to pickled green beans that provide a distinctive flavor and crunch. This choice is significant because the addition of the extreme bean not only enhances the visual appeal of the drink but also complements the savory elements of the Caesar, which often includes ingredients like Clamato juice, Worcestershire sauce, and a variety of spices.

In contrast, lemon and lime wedges are commonly associated with other cocktails but do not provide the unique taste profile that defines a Caesar. Olives can be used as garnishes for various cocktails, including martinis, but they are not standard in a traditional Caesar. Thus, the use of an extreme bean distinguishes the Caesar from other cocktails and showcases its specific preparation style and flavor combinations.