Backwards Birthday Cake

Heat oven to 350°F. Prepare batter and divide in two 8-inch round cake pans. Sprinkle batter with chocolate chips. Bake according to package directions. Transfer to wire rack and cool 10 minutes; invert and cool completely.

Level cakes. Fill and frost cake layers with vanilla frosting. Make a decorative border around rim with yellow frosting. Press colored sprinkles onto sides of cake. Place letter decorations backwards on top of cake.