You can also make a mousse cake by lining the bottom and sides of a cake pan or springform pan with ladyfingers–a circle of the sponge on the bottom and piped ladyfingers around the sides, spray them all with syrup, and fill withchocolate mousseorbutterscotch moussefor a sliceable mousse...
Then, scoop up the egg yolks one at a time and separate your fingers so the white falls back into the bowl. 4 Beat the yolk/sugar mixture. Use a hand-mixer on medium-high to beat the mixture until it lightens in color and thickens slightly, about 3 to 5 minutes. Stir in vanilla...