Combine first 6 ingredients; beat 2 minutes at medium speed of an electric mixer. Pour batter into a greased and floured 13 x 9-inch pan. Bake at 350 degrees F for 35 minutes or until a wooden pick inserted in center comes out clean. Let cake cool in pan on a wire rack. Combine confectioners'
Preheat oven to 325°F. Grease and flour Springform Pan. In Small Batter Bowl, combine cake mix and flour; mix well using Stainless Steel Whisk. Add water and egg; whisk until smooth. Pour batter into pan.