in center. Cool 1 minute; remove from cookie sheet to wire rack. Cool completely. Frost with VALENTINE FROSTING; decorate as desired. About 4 dozen cookies. VALENTINE FROSTING: In bowl, beat powdered sugar, shortening, milk, vanilla and food color, if desired, until smooth and of spreading consistency. About 0.75 cup frosting. VARIATION: CHOCOLATE VALENTINE FROSTING: Stir 3 tablespoons HERSHEY'S Cocoa into powdered sugar. Omit food color. Proceed as directed above, increasing milk to 3 tablespoons. Hershey's is a registered trademark of Hershey Foods Corporation. Recipe may be reprinted courtesy of the Hershey Kitchens.