Good-Cooking - Orange-Orange Cake

Ingredients

• 1/2 cup butter (or margarine)
• 1 1/2 cups granulated sugar
• 1 tablespoon orange peel (grated)
• 2 1/4 cups flour (sifted)
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup water
• 1/4 cup fresh orange juice
• 4 egg whites (beat stiff)