Which ingredient provides the nutty flavor in the Pink Squirrel cocktail?

The nutty flavor in the Pink Squirrel cocktail primarily comes from creme de almond. This ingredient is an almond-flavored liqueur, often used in cocktails to impart a rich, nutty essence that complements other flavors within the drink. Creme de almond is distinct in its profile, bringing a sweetness and depth that enhances the overall taste experience of the Pink Squirrel.

Other ingredients listed, such as creme de cacao, introduce chocolate notes, while heavy cream adds texture and richness without contributing the nut flavor. Rum, on the other hand, offers a different base spirit characteristic influenced by its aging process and can vary in flavor but does not carry the same nutty qualities as almond. Thus, creme de almond is essential for achieving the desired nutty taste in this particular cocktail.