2 sticks butter
4 1/2 c. sugar
1 sm. jar marshmallow fluff
1 can unsweetened condensed milk
1 1/2 lg. bags chocolate chips
1 lg. Hershey bar

Combine first 4 ingredients in medium size saucepan. Cook 8 minutes after mixture comes to a boil, stirring constantly. Add chocolate chips and Hershey bar. Stir until chocolate melts. Pour in ungreased pans. Let cool at room temperature until hard.