What ingredient provides the mint flavor in a Stinger cocktail?

In a Stinger cocktail, the distinctive mint flavor primarily comes from White Creme de Menthe. This is a sweet, mint-flavored liqueur that is made from a base of distilled alcohol infused with peppermint and other mint herbs. Unlike mint leaves, which can impart a fresh herbal quality but may not have the same intensity of flavor, White Creme de Menthe is specifically designed to deliver a concentrated mint taste, enhancing the overall character of the cocktail.

The other options do not provide the same flavor profile that is signature to a Stinger. For instance, while peppermint schnapps could potentially add a mint flavor, it typically has a more pronounced and often sweeter taste than that of the White Creme de Menthe used in a standard Stinger recipe. Gin, on the other hand, does not contribute any mint flavor; instead, it offers a botanical profile that is quite different. Thus, White Creme de Menthe is established as the essential ingredient that delivers the desired mint flavor in the Stinger cocktail.