1 (13 oz.) jar marshmallow fluff
10 oz. bag Reese's pieces or chocolate chips
3 c. sugar
1 1/2 stick butter
1/2 tsp. vanilla
2/3 c. evaporated milk

Put sugar in pan, add butter and milk. Stir constantly over medium heat. Bring to boil and cook exactly 5 minutes. Take off heat and add vanilla, chips and stir until chips are melted, stir in fluff. Stir until smooth. Pour into 8x11 inch buttered pan. Set in refrigerator overnight. Cut and serve.