Classic Angel Food Cake
Preheat oven to 350 degrees
Measure egg whites, adding or removing whites as needed to equal 1-1/2 cups.
Place in a mixing bowl; let stand at room temperature for 30 minutes.
Sift confectioners' sugar and flour together so that there are no lumps.
Bake for 40-45 minutes or until cake springs back when lightly touched.
Immediately invert pan; cool completely before removing cake from pan.