I made this for my husband’s birthday . chocolate cake ,filled first with chocolate ganache and then hazelnut filling. I made 2 9″ cakes. torte them to make a 4 layers cake, doubled the hazelnut filling recipe.the cake was gone in 5 minutes, absolutely delicious
4 large egg whites
1 cup granulated sugar
3 sticks unsalted butter, softened
1 tablespoon hazelnut liqueur
over a double boiler, add the egg whites and sugar mix until sugar is dissolved
about 3 minutes( touch it, until you don’t feel any grains). let it cool. put in your mixer and beat on high until you see peaks form about 5 minutes. add butter and hazelnut liqueur continue beating on high for another 5 minutes.