1 jar marshmallow fluff
1/4 c. butter
2/3 c. evaporated milk
1 1/2 c. sugar
1/2 tsp. salt
12 oz. bag semi - sweet morsels
1 tsp. vanilla
1 c. chopped walnuts

In sauce pan combine first 5 ingredients over medium heat until mixture boils. Boil for 5 minutes, stirring constantly. Remove from heat. Stir in chocolate bits. Add vanilla and nuts. Pour into 8 x 8 inch greased pan. Chill. Cut before hardened.