1/4 c. butter 2 1/2 c. sugar 1 - 5 oz can evaporated milk 1 - 7.5 oz jar marshmellow fluff 1 tsp vanilla 1 - 12 oz bag semi sweet chocolate chips
Combine first 5 ingredients. Stir over low heat until blended. Bring to a BOIL over low heat, being careful not to mistake air bubbles for boiling. Then boil slowly, stirring constantly, for 5 minutes. Remove from heat. Stir in chocolate and vanilla until chocolate is melted. Then turn into a 9x9 pan and cool.