Melt butter, peanut butter and marshmallows together, stir in Rice Krispies. Press onto a liberally buttered piece of wax paper (about 11×15 section). Melt chocolate chips and peanut butter together. Spread chocolate mixture onto Rice Krispies and allow to set for 4-6 minutes. Gently roll up Rice Krispies and chocolate mixture, just like Cinnamon Rolls. Wrap in the buttered wax paper and chill before slicing. A very simple and yummy snack!