Chocolate Layer Cake

From "The International Jewish Cook Book", by Florence Kreisler Greenbaum

Stir one scant half cup of butter to a cream with one cup of sugar. Add alternately one-half cup of sweet milk, yolks of two eggs which you have previously beaten until quite light, add whites of two, and one-half cup of sifted flour. Make a custard of one-half cup of milk, with one cup of grated chocolate, one-half cup of granulated sugar; boil until thick, add the yolk of one egg, then remove from the fire; stir until cool, add this to the cake batter, add one and one-half cups of sifted flour, two teaspoons of baking-powder and one of vanilla flavoring.

Bake in layers and ice between and on top with plain white icing flavored to taste. You may substitute almond or colored icing.