one 16-ounce package peanut butter sandwich cookie divided 1/4 cupâ  (1/2 stick) unsalted butter, melted one 3.9-ounce package jell-o instant chocolate pudding mix (not sugar-free) 1 1/2â  cups cold milk (use cow’s milk; pudding won’t set up with soy, almond, cashew milk. i used 1% cow’s milk) 4 ouncesâ  phil