Prepare the Filling: In a large bowl, beat together cream cheese, peanut butter, powdered sugar, and vanilla extract until smooth and creamy.
Fold in Whipped Cream: Gently fold in the whipped cream to keep the filling light and airy.
Assemble the Pie: Pour the filling into the prepared crust and smooth the top.
Chill: Refrigerate for at least 4 hours, or until set.
Optional Topping: Before serving, drizzle with melted chocolate or sprinkle with chopped peanuts.
