Make the Crust:
Line an 8x8-inch baking pan with parchment paper, leaving some overhang for easy removal.
Place the Oreo cookies in a food processor and pulse until finely crushed. Alternatively, crush them in a zip-top bag using a rolling pin.
Mix the Oreo crumbs with melted butter until evenly combined.
Press the mixture firmly and evenly into the bottom of the prepared pan to form the crust. Place in the fridge to set while you prepare the filling.
Make the Filling:
In a large mixing bowl, beat the softened cream cheese with powdered sugar and vanilla extract until smooth and creamy.
In a separate bowl, whip the heavy cream to stiff peaks using a hand or stand mixer.
Gently fold the whipped cream into the cream cheese mixture until fully incorporated.
Fold in the chopped Oreo cookies.
Assemble the Bars:
Spread the cheesecake filling evenly over the chilled crust, smoothing the top with a spatula.
Cover the pan with plastic wrap and refrigerate for at least 4 hours or overnight until set.
Serve:
Lift the cheesecake out of the pan using the parchment overhang and slice into bars.
Top with crushed Oreo cookies or whipped cream, if desired.