Place each piece separately on an ungreased cookie sheet, 1 – 2 inches apart. Bake in a preheated, 350 degrees F (175 degrees C) oven until lightly browned (7-8 minutes for 1/4 inch thick cookies). Cool completely on wire rack. Frost bottom cookie with Pink Valentine Frosting and place an open centered cookie on top to form the sandwich. Also frost the small 1 1/2 inch hearts and serve as separate cookies.