Best Low-Fat Chocolate Cake

Ingredients

• 1 12 cups sugar
• 1 34 cups flour
• 34 cup cocoa powder
• 1 12 teaspoons baking soda
• 1 12 teaspoons baking powder
• 4 egg whites
• 1 cup nonfat milk
• 12 cup applesauce
• 12 teaspoon vanilla
• 1 cup boiling water
• 4 tablespoons light margarine
• 2 tablespoons nonfat yogurt
• 12 cup cocoa powder
• 2 cups powdered sugar
• 3 tablespoons nonfat milk
• 2 teaspoons vanilla