how to make a sponge cake easy
How to Make a Sponge Cake. 1  Separate egg whites from egg yolks. 2  Pour egg whites into a mixer and beat until soft peaks form. 3  Soft peaks should be standing, but still sort of folding over. 4  Add sugar and beat on high until stiff peaks form. Separate egg whites from egg yolks. 2  Pour egg whites into a mixer and beat until soft peaks form. 3  Soft peaks should be standing, but still sort of folding over. 4  Add sugar and beat on high until stiff peaks form.