Directions

1. In a saucepan, combine chocolate, 1/2 cup milk, brown sugar, and egg yolks. Cook over low heat, stirring constantly, until custard is thick and smooth. Cool.
2. Stir together flour, soda, baking powder, and salt.
3. In a large bowl, cream butter or margarine. Blend in white sugar, beating until light and fluffy. Mix together 3/4 cup milk and vanilla. Stir flour mixture into creamed mixture alternately with flavored milk. Make 3 dry and 2 liquid additions, combining lightly after each. Stir in cooled chocolate custard.
4. Beat egg whites to form stiff but moist peaks. Fold into cake batter, and beat by hand for 1 minute. Turn batter into two greased and floured 8 inch round cake pans.
5. Bake at 350 degrees F (175 degrees C) for 25 to 30 minutes, or until cake springs back when lightly touched. Cool layers for 5 minutes, and then remove from pans. Cool completely.