Beat together cream cheese, powdered sugar and marshmallow fluff in a large bowl until well mixed.
Melt butter, 12 Snickers and semi sweet chips over low heat in a medium sauce pan. Stir until blended.
Add Snickers mixture to cream cheese mixture and stir to combine.
Transfer to serving bowl.
Crush peanuts in food processor and top serving bowl.
Cut remaining Snickers into bite size pieces to use as garnish on top.