Which spirit is included in the recipe for an Old Fashioned cocktail?

The Old Fashioned cocktail is traditionally made with bourbon or rye whiskey, which is why Bulliet bourbon is the correct answer. Bourbon is a type of American whiskey that has a rich flavor profile, often including notes of caramel and vanilla, which complement the simple ingredients of the Old Fashioned—bitters, sugar, and a twist of citrus peel.

In contrast, the other spirits listed do not align with the classic Old Fashioned recipe. Gordons gin is a gin, which is not used in this cocktail; Aviation gin is also a type of gin, thus making it unsuitable for an Old Fashioned; while Jack Daniels honey, being a flavored whiskey, alters the taste and does not reflect the traditional formulation of the drink. Therefore, Bulliet bourbon is the appropriate choice, as it fits the foundational elements of a classic Old Fashioned cocktail.