Glorious Sponge Cake 1 Reviews By Anonymous recipe Comments | 0 Favorites | 14 Print This is an old fashioned sponge cake with a lemon flavor. Glorious Sponge Cake Ingredients 6 eggs1 cup white sugar1/4 cup water1 teaspoon lemon extract1 teaspoon lemon zest1 cup cake flour1/2 teaspoon cream of tartar1/4 teaspoon salt Instructions 1 Separate the eggs. In a large mixing bowl, beat egg yolks until very thick and lemon colored. Beat in sugar gradually. Add water, lemon extract and lemon rind. Beat in flour. 2 In another bowl, beat egg whites until frothy. Then add cream of tartar and salt. Beat mixture until whites are stiff, but not until they are dry. Fold this whipped mixture into yolk mixture. 3 Pour batter into an ungreased 9 inch tube pan. Bake at 325 degrees F (165 degrees C) for one hour, or until done.