GANACHE:
Put chocolate chips in heat proof bowl. Make the ganache by bringing heavy cream to just a boil and pour over chocolate chips. Let sit for 2 minutes and then stir in small circular motions until cream and chocolate are completely blended. Put in fridge to cool.
PEANUT BUTTER FILLING:
In a mixing bowl add peanut butter, confectioners sugar and mix on low. Slowly add the heavy cream and increase the speed of mixer to medium until well mixed. Mixture may appear a bit grainy but that will change with the next step. Next add the chilled chocolate ganache into the peanut butter mixture and mix on medium until will blended, about 2 minutes.
Pour into pie shell and immediately refrigerate until ready to serve. Add whipped topping right before serving. Refrigerate after serving.