To make red cake layers: Heat oven to 350°F. Grease or spray two 8-inch round pans; place 8-inch round piece cooking parchment paper in bottom of each pan. Grease or spray parchment paper. In large bowl, beat red cake layer ingredients with electric mixer on low speed 30 seconds, then on high speed about 2 minutes or until smooth. Spread in pans. Bake 29 to 34 minutes or until top springs back when lightly touched. Cool 10 minutes; run knife around sides of pans to loosen cakes. Gently remove from pans to cooling rack; remove parchment paper. Cool completely, about 30 minutes. Flatten cake layers by trimming off rounded tops. Cut layers in half horizontally to make 4 thin red layers. In 1 layer, cut small round out of center, using 4-inch biscuit cutter. Wrap and freeze 1 thin layer and the layer that was cut out of; save for another use.