2 sticks butter, soft
2 c. sugar

Mix together and add 4 eggs, one at a time. Add 2 squares melted unsweetened chocolate. Stir and add 1 cup flour; mix well. Add 1 teaspoon vanilla and pour in a greased and floured pan. Top with walnut pieces or pecan pieces. Bake at 325 degrees for 45 minutes or less.