In a medium bowl, mix peanut butter, powdered sugar, and cream cheese until smooth.
In a separate bowl, whip the heavy cream with sugar and vanilla until stiff peaks form.
Fold the whipped cream into the peanut butter mixture until fully combined.
Pour the mixture into the chocolate cookie crust, smoothing the top.
Chill the pie in the refrigerator for at least 4 hours or overnight.
Before serving, top with chopped Reese’s Peanut Butter Cups and drizzle with chocolate syrup.