1 box white cake mix
1 1/4 cups water
1/3 cup vegetable oil
3 egg whites
2 containers fluffy white frosting
1 pouch sugar cookie mix
2 tablespoons all-purpose flour
1/3 cup butter or margarine, melted
1 whole egg
Decorating Cookie Icing red, green and white icing (from 7-oz pouches)
Heat oven to 350°. Grease 2 (9-inch) square cake pans with shortening and lightly flour, or spray with baking spray with flour.
In large bowl, beat cake mix, water, oil and egg whites with electric mixer on low speed 30 seconds, then on medium speed 2 minutes. Pour batter into pans. Bake 23 to 28 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes; remove from pans to cooling racks. Cool completely. Cut each cake horizontally to make 2 layers.
Place 1 cake layer, cut side up, on serving plate; spread one-fourth of 1 container of frosting on cake to within 1/2 inch of edge. Top with second cake layer, cut side down; spread with another one-fourth of the container of frosting.
Repeat layers with remaining 2 cake layers and remaining first container of frosting. Reserve 1/2 cup frosting from second container. Frost side and top of cake with remaining frosting. Spoon reserved 1/2 cup frosting into decorating bag fitted with large round tip; pipe frosting around top and bottom edge of cake. Refrigerate until ready to decorate.
Heat oven to 375°. In medium bowl, stir cookie mix, flour, butter and whole egg until soft dough forms. On lightly floured surface, roll dough to 1/4-inch thickness. Cut with floured 4-inch ornament-shaped cookie cutters. On ungreased cookie sheets, place cutouts 1 inch apart.
Bake 7 to 9 minutes or until lightly browned. Cool 1 minute; remove from cookie sheets to cooling racks. Cool completely. Decorate cookies as desired with cookie icing and yellow sugar. Attach cookies to sides of cake using icing. Insert 3 cookies on top of cake.