Transfer the base mixture to the prepared pan, pressing firmly to compact it. You can use the bottom of a measuring cup or a flat-bottomed glass to press the crumb mixture into the pan. This ensures an even and compact base. Refrigerate while preparing the filling.
Beat softened cream cheese with the vanilla, whipping cream, and sugar. Once the ingredients are well combined, add chopped Oreo cookies and stir. Pour the cheesecake filling over the prepared base.
Refrigerate for 4-6 hours or until firm. For the best results, refrigerate the cheesecake overnight. This will give it time to set completel.
Divide the cheesecake into squares. You can get 9 regular servings or 16 tiny bites.