From 1917:
Cream 1 cup of sugar with 2 tablespoons butter or oleomargarine. Put 2 tablespoons corn starch in a bowl and add flour enough to make 2 cups, add teaspoon cream tartar, ½ teaspoon soda and sift 3 times. Mix with 1 cup milk and flavor with 1 teaspoon lemon extract. Bake in a moderate oven and spread with an icing made of lemon juice and confectioner’s sugar.