In a medium, microwave safe bowl, combine butte and peanut butter. Heat in microwave until soft, mix well. Gradually stir in confectioners' sugar until the mixture resembles a soft dough. Spread mixture into pie crust.
In small bowl, mix the milk with the instant pudding. Pour over the peanut mixture in each crust. Chill until firm.
Top pies with whipping topping when ready to serve