1 1/2 c  Superfine sugar — divided          2 ts Cream of tartar
     1 c  Sifted cake flour                   4 ts Vanilla
   1/4 ts Salt                                2 oz Unsweetened chocolate,
    16 lg Egg whites (2 cups), at room             -grated
          -temperature                   
 Preheat oven to 350. Position oven rack at lowest level. Combine 3/4
 cup of the sugar, flour and salt; whisk well. Beat egg whites in a
 large bowl until frothy. Add cream of tartar. Beat until soft peaks
 form. Beat in remaining sugar until stiff peaks form. Fold in flour
 mixture 1/4 cup at a time. Fold in vanilla and chocolate. Turn into
 ungreased two-piece 10-inch tube pan. Bake until golden brown or
 until toothpick inserted in comes out clean, about 40 minutes. Invert
 cake. Cool over a narrow-neck bottle. Loosen cake from edges of pan
 with narrow spatula.
                 
                 Yields       
                1 servings