8 oz Butter or Margarine

      2 c  Sugar

      4    Eggs, separated

  2 2/3 c  Sifted Cake Flour

      2 ts Baking Powder

    1/2 ts Salt

      1 c  Milk

      2 ts Vanilla

      5 oz German Sweet Chocolate Bars

  Cream butter and sugar together. Add yolks one at a time, beating well
  after each addition. Add sifted dry ingredients, alternating with
  milk and vanilla. Add in thirds, beating until smooth after each
  addition. Grate chocolate coarsly, reserving 1/3 cup for the topping.
  Beat whites until stiff and fold into batter, add remaining chocolate
  to batter and mix. Pour in a greased and floured 9x13 pan. Sprinkle
  the top with the 1/3 cup of grated chocolate. Bake in a preheated
  350oF oven for 40 minutes.

  Source: "The Yankee Kitchen" 03-18-93 (#2) [Bea Roe]