Your children will enjoy helping with these sugar cookies cut with a six-pointed star cutter and decorated with blue icing.
Combine the shortening and the margarine; beat for 30 seconds. Add the sugar; beat until light and fluffy. Beat in the egg and the vanilla. Combine the flour, cinnamon, soda, cream of tartar, mace, nutmeg, and 1/4 teaspoon salt. Add to the margarine mixture; beat well. Wrap and chill dough. On lightly floured surface, roll dough to 1/8-inch thickness; cut with cookie cutters. Place on ungreased cookie sheets. Bake at 350 degrees F about 8 minutes. Cool on racks. Pipe on icing. Makes about 60 cookies.
Blue Royal Icing: Beat together 2 egg whites, 3/4 teaspoon vanilla, and enough sifted powdered sugar (3-1/2 to 4 cups) to make of piping consistency. Stir in a few drops blue food coloring.