Which element is NOT typically included in a Dirty Martini?

A Dirty Martini is traditionally made with gin or vodka, olive juice, and generally includes dry vermouth. The inclusion of olive juice is what characterizes it as "dirty," giving it a distinctive flavor profile that sets it apart from a standard martini.

Sweet and sour mix, typically used in cocktails like margaritas or whiskey sours, is not a part of the classic Dirty Martini recipe. This mix contains sugar and citrus, which would alter the intended balance of flavors in a Dirty Martini and take it away from its savory characteristic.

In contrast, both gin and dry vermouth are essential components of not just the Dirty Martini but traditional martinis in general. The presence of these ingredients is crucial for achieving the desired taste and texture. Consequently, the correct choice reflects the ingredient least associated with the Dirty Martini and serves to underscore the drink's specific flavor profile.