4 oz Unsweetened chocolate
1/2 c  Butter or margarine
2 c  Sugar
4    Eggs; beaten
1 c  Sifted flour
1 ts Vanilla
1 c  Coarsely chopped walnuts
6 oz Semisweet chocolate pieces

Melt unsweetened chocolate and butter in top of double boiler over hot
water. Cool slightly. Gradually add sugar to eggs, beating thoroughly after
each addition. Blend in chocolate mixture. Stir in flour. Add vanilla, half
of nuts and half of semisweet chocolate pieces. Spread in greased 9-inch
square pan. Sprinkle remaining nuts and chocolate pieces over batter. Bake
at 325F 30 minutes. Remove and cool in pan. Cut in squares.