Nut Cake

Cream 2 Tbsp. butter with one Tbsp. of sugar, add 3 egg yolks and mix thoroughly. Sift 2 cups flour with 2 tsp. baking powder and add alternately with 1 cup milk to creamed mixture. Add desired flavoring and a pinch or so of salt. Add one cup of English walnuts cut fine. Fold in 1 beaten egg white (save the other two for use in frosting). Bake in a slow oven.