Soft creamy prepared food using air bubbles for texture
A mousse (, French: [mus]; lit. 'foam') is a soft prepared food that incorporates air bubbles to give it a light and airy texture. Depending on preparation techniques, it can range from light and fluffy to creamy and thick. A mousse may be sweet or savory. History. Various desserts consisting of whipped cream in pyramidal shapes with coffee, liqueurs, chocolate, fruits, and so on either in the mixture or poured on top were called crème en mousse ('cream in a foam'), crème mousseuse ('foamy cream'), mousse ('foam'), and so on, as early as 1768.
https://en.wikipedia.org/wiki/Mousse