Swap all but the cake mix for a bottle of soda. Stir 12 ounces of a carbonated beverage into your prepackaged cake flour, plop the mixture into a pan and bake it in the oven as directed on the box. There you have it: Cake.
Soda and cake infinite combos, plus cuts out the fat regular or diet soda in multitude of flavors can create specialty cake flavors use your imagination! *I did this with a duncan heins yellow cake mix and 12 oz sprite.