1/2 cup reduced calorie stick margarine
1 3/4 cups + 2 Tablespoons all purpose flour
2/3 cup skim milk
6 packs sweet n low or 2 teaspoon bulk sugar
2 teaspoon baking powder
2 large egg whites room temperture
1/4 cup liquid eggs substitute
1/4 teaspoon salt
4 teaspoon cream of tartar 

Preheat oven 350 degrees. Spray cake pans with non stick cooking spray. In large bowl with mixer at medium speed, beat first four ingredients until smooth. Into small bowl, sift together next three ingerdients add to creamed mixture alternately with milk, beating well after each addition. In large metal bowl with mixer at high beat egg whites and cream of tartar until stiff;  fold into batter. Divide batter evenly between prepared pans. 

Bake 350 degreed for 18-20 minutes or until done take out of oven cool completely on wire rack.