Instructions: Preheat oven at 350. Prepare 2 round pans with cooking spray and flour. To prepare cake, combine flour, sugars, baking soda, and salt. In another mixing bowl, combine margarine buttermilk, vanilla, egg whites, and chocolate. Mix dry ingredients with wet ingredients just until moistened.

Pour mixture into prepared pans. Bake for 30 to 35 minutes. Meanwhile, to prepare frosting, combine powdered sugar, margarine, vanilla, and milk until spreading consistency. Fill and frost layers.

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