Angel Food Cake 

1 cup cake flour
1/4 tsp. salt
1 cup egg whites
1 1/4 cups sifted sugar
1 tsp. cream of tartar
1 tsp. vanilla 

Sift flour several times. Beat egg whites until frothy. Add cream of tartar and salt, beating until stiff but not dry. Gradually beat in sugar, add vanilla, then fold in flour, in fourths. Pour into ungreased 9" tube pan. Bake at 325 F about 1 hour. Invert pan on rack. Let stand until cold. Serve plain or glazed.