Sour Cream Sponge Cake

When a cake is made of very fine layers and iced, the effect is striking because the texture of fine delicate cake and rich smooth filling merge together into a very specific combination of light silkiness. This delicate Austrian cake is best known as a layer in the classic torte dobos. This cake batter is almost identical to the classic separated-egg sponge cake (biscuit), except that sour cream or crème fraîche is folded in with the beaten whites and yolks as flour is being sift