Which ingredient is NOT used in a Golden Cadillac cocktail?

The ingredient that is not used in a Golden Cadillac cocktail is hazelnuts. The Golden Cadillac is traditionally made with equal parts of White Creme de Cacao, Galliano, and cream, along with a base of brandy. Each of these components contributes to the cocktail's characteristic sweet and creamy flavor profile.

Hazelnuts do not belong to this list of ingredients and are not part of the standard recipe. Instead, they might be confused with nut-flavored liquors or liqueurs, but they are not involved in the preparation of a Golden Cadillac. The focus on chocolate, anise from Galliano, and the creamy texture from the cream makes this cocktail distinct, whereas hazelnuts would not provide the same effect or flavor in this context.