Weight Watchers Diet Coke Cake

                                                                                                               

1 box cake mix, any flavor
1-12 oz can of diet soda, any flavor 
1/3 cup egg substitute
Directions:



Preheat oven to 350 degrees.

Combine all ingredients in a mixing bowl and beat on medium speed for 2 minutes, scraping down sides periodically.
Pour batter into a 13x9 pan coated with cooking spray.
Bake according to cake mix directions, about 30-35 minutes.
Cool in pan.
Dust with powdered sugar, if desired (optional).