Preheat your oven to 375°F (190°C).
In a bowl, mix together the melted unsalted butter, white sugar, and crushed Oreo cookies until it forms a thick paste.
Grease an 8-inch round pan with butter or nonstick spray.
Press the Oreo cookie mixture into the bottom of the pan to form the crust layer for your cheesecake.
In another bowl, blend together the cream cheese, cocoa powder, and pure vanilla extract until smooth and well combined.
Spread the cream cheese mixture evenly over the Oreo crust layer using an offset spatula.
Top the cream cheese layer with the whipped topping, spreading it out to cover the entire surface of the cheesecake.
Garnish the top of the cheesecake with crushed Oreo cookies.
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cheesecake to cool before serving.
Enjoy your delicious Ruth Chris Cheesecake!