Preheat the oven to 350°F (175°C).
In a medium bowl, combine graham cracker crumbs, melted butter, and granulated sugar. Mix until well combined.
Press the graham cracker mixture firmly into the bottom of a 9×9 inch baking pan to form an even crust.
Bake the crust in the preheated oven for 8 to 10 minutes, until lightly golden. Remove from oven and let cool completely.
In a large bowl, beat the softened cream cheese with powdered sugar and vanilla extract until smooth and creamy.
In a separate bowl, whip the heavy cream until stiff peaks form.
Gently fold the whipped cream into the cream cheese mixture until fully combined.
Fold in the finely crushed Oreo cookies into the cream mixture.
Spread the cookies and cream filling evenly over the cooled graham cracker crust.
Sprinkle the chopped Oreo cookies evenly on top of the filling.
Refrigerate the bars for at least 3 hours or until firm.
Cut into 12 bars and serve chilled.