Combine cookie crumbs and melted butter and press into a 9 inch pie plate. Chill in the refrigerator until ready to use.
Beat cream cheese with a hand mixer until smooth. Mix in peanut butter and sugar. Gently fold in 1 container (8 ounces) of Cool Whip. Add filling into pie crust and evenly spread.
Melt semi-sweet chocolate chips and stir in half of a container of Cool Whip. Spread over top of pie.
Chill pie at least 4 hours before serving.
Before serving, top pie with chopped Twix candy bars and melt about 1/4 cup chocolate chips and drizzle over the Twix.