A Chocolate Mousse is a Mousse (which is a chilled desert plate usually made up of gelatin, eggs, and (sometimes whipped) cream) with a chocolate flavor mixed into it.
"Le mousse de chocolate" yum. just made some.Actually, I'm pretty sure it's "de la mousse au chocolat" for when you're saying "some chocolate mousse." This could be used in the sentence "J'adore...