In a large mixing bowl, combine the creamy peanut butter, powdered sugar, and softened cream cheese. Beat with an electric mixer on medium speed until smooth and well combined.
Add the whipped topping and vanilla extract to the mixture. Gently fold in the whipped topping until fully incorporated.
Stir in the crushed Butterfinger candy bars, reserving a small amount for garnish if desired.
Pour the mixture into the graham cracker pie crust, spreading it evenly.
Cover the pie with plastic wrap and refrigerate for at least 4 hours, or overnight for best results.
Before serving, drizzle chocolate syrup over the top and sprinkle with the reserved crushed Butterfinger bars.