Step 1
Heat oven to 350°F (325°F for dark or nonstick pans). Make, bake and cool cake as directed on box for two 8-inch or 9-inch round pans--except use 1 1/4 cups of orange juice mixture in place of the water and add 1 1/2 teaspoons orange peel along with egg whites. Chill completely cooled layers 45 minutes before cutting.