Cream together sugar and butter in an electric mixer. When fluffy, add vanilla and lemon rind. Blend well. Add eggs, one at a time; mix well. Remove from mixer. Add cake flour; blend with a heavy mixing spoon. Chill dough in refrigerator 1 hour or overnight. Roll dough to 1/8-inch thickness and cut out with cookie cutters. Bake in preheated 375-degree oven until brown, about 7-8 minutes. Note: If colored granulated sugar is used for decoration, prepare an egg wash (1 well-beaten egg with 1 tbsp. milk) and brush over the cut-out dough. Sprinkle with sugar and bake. Makes 10 dozen cookies. ----