In a separate bowl combine 4 cups flour, 3 1/2 cups sugar, 6 egg whites, 1 cup sour cream, 2 teaspoons soda and 1 teaspoon salt.
Add cocoa mixture. Put in pan. Pour into two greased 9 x 13 inch pans.
Beat together 2 (8 oz) packages of cream cheese, 2/3 cup sugar, and 2 egg whites.
Dot over brownies and swirl with knife. Sprinkle two cups of chocolate chips and bake at 350 for 40-45 minutes.
