1Preheat oven to 350. Grease and flour (or spray with Pam for baking) an 11 X 13 cake pan. In a large bowl, mix all ingredients except frosting on medium until well mixed. Add the frosting to the batter and stir by hand until well mixed. Pour into prepared pan and bake for the time directed on the cake mix box PLUS ABOUT 10 MINUTES (approximately 45 minutes) until toothpick comes out clean. Leave cake in pan or transfer to a cake plate as desired. You can sprinkle with confectionary sugar if you wish and serve warm or cool.