Wellesley Fudge Cake 1/2 cup butter or margarine 1 7/8 cups sugar 4 egg yolks 1 cup all-purpose flour 1 cup cocoa 4 teaspoons baking powder 1/2 teaspoon salt 4 egg whites 1 cup milk 2 teaspoons vanilla extract -- FROSTING: 12 ounces chocolate chips 3/4 cup sour cream 1 teaspoon vanilla extract 1 pinch salt With mixer, cream together margarine and sugar. Add egg yolks; beat at high speed. In bowl, mix dry ingredients with a whisk. Add to creamed mixture. Mix in at low speed. With mixer, beat egg whites to soft-peak stage. Fold in some of the cake batter. Alternate remaining cake batter with milk and vanilla combined. Pour into three 9-inch layer pans, which have been greased and lined with parchment paper. Bake at 325 F. for 20 to 25 minutes. For frosting: Melt chocolate chips in top of double boiler. Remove from heat. Stir in sour cream, vanilla extract, and salt. Frost cake with warm frosting. Makes 12 servings. *Rather than fold the stiff batter into the beaten egg whites, add the milk and vanilla to the creamed mixture along with the flour and cocoa mixture; then fold beaten egg whites into batter. - - - - - - - - - - - - - - - - - -