What is a mousse cake? Mousse cake is a sweet chilled dessert typically made with whipped egg whites and whipped cream, generally flavored with chocolate or fruit puree. It is a frothy and creamy dessert that will melt in your mouth in no time giving you a pure sweet bliss. Mousse cake is not only an impressive looking desserts but it tastes as incredible as it looks. It is light and airy in texture and not-overly sweet in taste. It will slide down your throat smoothly and lingering over each bite, which will most likely make you reach for another bite. Mousse cake is a fabulous dessert to enjoy after a big, hearty meal with your family and loved ones. It is a luscious and sophisticated dessert that can never fail to impress everyone.