If using a stand mixer, fit with paddle attachment.
In a medium mixing bowl, mix together peanut butter and cream cheese until combined.
Add in powdered sugar and (gently) beat to combine.
Add in vanilla extract and beat to combine.
Using a rubber spatula, fold Cool Whip into the peanut butter mixture until completely combined
Pour mixture into prepared Graham cracker pie crust and smooth out.
If desired, top pie with chocolate syrup, peanut butter syrup, and crushed peanuts.