Beacon hill brownies

8 oz Unsweetened chocolate
      1 c  butter
      5    Eggs
      3 c  Sugar
      1 tb vanilla
  1 1/2 c  flour
      2 c  Walnuts; coarsely chopped
 
  Melt chocolate with butter in saucepan over very low heat; stirring
  constantly until smooth. Cool slightly. Beat eggs, sugar, and vanilla
  in a large mixing bowl at high speed 10 min. Blend in chocolate at
  low speed. Add flour, beating just to blend. Stir in walnuts. Spread
  in greased 13x9" pan. Bake at 375~ for 35-40 minutes. (do not
  overbake). Cool in pan. Cut into bars or squares. Makes 24-32