Ingredients
1/3 cup cake flour3 tablespoons sugar1/4 teaspoon baking powder1/8 teaspoon salt1 large egg yolk1 tablespoon orange juice1 tablespoon canola oil1-1/2 teaspoons water1/2 teaspoon grated orange zest2 large egg whites1/8 teaspoon cream of tartarFrosting, optional
Preparation
Line the bottom of two ungreased 4-in. tube pans with parchment or waxed paper; set aside. In a small bowl, combine the flour, sugar, baking powder and salt. Add the egg yolk, orange juice, oil, water and orange zest; beat until smooth. In another small bowl, beat egg whites and cream of tartar until stiff peaks form. Fold into batter.
Spoon into prepared pans. Bake at 325° for 15-20 minutes or until a toothpick comes out clean. Immediately invert pans to cool. Loosen cake from pan with a knife; remove cakes. Frost if desired.
