Which ingredient is included in the Titos Long Island Peach Tea recipe?

The Titos Long Island Peach Tea recipe incorporates peach flavor as a fundamental component, which aligns with the inclusion of a peach smoothie in the drink. This ingredient contributes to the overall fruity and refreshing essence that characterizes the cocktail. The introduction of peach enhances the sweetness and lends a vibrant color, making it visually appealing as well as flavorful.

The other ingredients listed do not match the specific requirements of the Titos Long Island Peach Tea. Grand Marnier is a type of liqueur that adds orange flavor, which is not relevant to the peach profile of this particular drink. Goose likely refers to Grey Goose, a brand of vodka, which is not traditionally part of the Long Island Tea recipe. Bacardi, while a well-known rum, is also not a standard component for this peach tea variant. The focus on peach is what makes the selected ingredient essential for this cocktail.