1 1/2 Cups Flour
2/4 Cups Cocoa Powder
1 1/2 Cups Sugar
1 teaspoon baking powder
4 egg whites
1 cup non fat Yogurt
1 teaspoon Vanilla
Combine the dry and wet ingredients in seperate bowls. Stir the dry into the wet and transfer to an oiled baking dish. Bake at 350 for 40 minutes.