Mousseline Buttercream, the Classic Filling for Génoises

Génoises are usually filled with a classic preparation that is nowadays considered a no-no for one’s health but which, like everything else, is not going to hurt anyone if enjoyed once in a while. Why so much bother for a once-in-a-while cake? Simply because such a cake is one of the pleasures of life; a sliver of it is really pure joy, especially when the cream is nicely flavored with a great liqueur or chocolate. There are across Europe about twenty different formulas for buttercream. The