This Walnut Meringue Cake With Dark Chocolate Mousse is a decadent, elegant and delicious cake that will win your heart for ever. This cake is called an entremet and it is one of the best cakes I ever had. The layers of meringue and chocolate mousse are easy to make and the results are fabulous! Enjoy! For this recipe, you need a kitchen scale. You will also need a 9x3 inch cake ring or 9-inch springform.