1 yellow cake mix
 1 sm. can mandarin oranges save juice
 3 egg whites
 1 1/2 cups water
 Preheat oven to 350 degrees. Spray with non-stick Pam-type.
 In mixing bowl combine cake mix, egg whites, and water.
 Empty juice in measuring cup. Should be at least 1/4 cup if not
 add water. Mix this and the oranges in cake mix with electric
 beat for 2 minutes at med.-high speed until lumps are gone.
 Bake for 30 minutes or until cake springs back. Cool on rack.
 You could also mix  in 8 oz. of softened fat-free cream cheese 
 to give it a different flavor.  Sorry I don't know that fat content.
 Wouldn't think it would be more than 5 grams per piece.