Chocolate Chip Butter Cake

8 oz Butter or Margarine

2 c Sugar

4 Eggs, separated

2 2/3 c Sifted 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]