A mousse (French 'foam' ) is a prepared food that incorporates air bubbles to give it a light and airy texture. It can range from light and fluffy to creamy and thick, depending on preparation techniques. A mousse may be sweet or savory. Dessert mousses are typically made with whipped egg whites or whipped cream, flavored with chocolate, coffee, caramel, puréed fruits or various herbs and spices, such as mint or vanilla. Sweetened mousse is served as a dessert, or used as an airy cake filling. It is sometimes stabilized with gelatin. Savory mousse may be flavored with hard boiled egg, herbs, fish or liver.

Moussé (, Gallo: Móczaé) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.