Using a stand mixer fitted with the paddle attachment or a hand mixer, cream the peanut butter, cream cheese, sugar and vanilla until smooth. Scrape down the bowl once complete.
Fold in the cool whip by hand using a rubber spatula. Gently mix until combined.
Pour the filling over the prepared crust.
Add desired toppings (i.e. sprinkle with peanut butter crumbles and drizzle with chocolate syrup & melted peanut butter).
Freeze for minimum 2 hours or overnight. Store in the freezer.