The french word mousse translates to "Foam" In english, perfectly describing how light and fluffy the dessert should be. However, most mousse recipes use raw eggs, which is a problem for anyone concerned about salmonella. Instead, use gelatin and heavy cream for an egg-free chocolate dessert. Plan in advance, as the mousse needs to chill for an hour before serving. If you don't allow the gelatin time to set, it will be thinner than you might expect a mousse to be.