Creating these delightful Oreo Cheesecake Cookie Cups is simple when you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners.
2. Prepare the Cookie Crust: In a medium bowl, crush 24 Oreo cookies into fine crumbs. Add the melted butter and mix until well combined.
3. Form the Cookie Base: Press a tablespoon of the Oreo mixture into the bottom of each muffin liner, creating a firm base.
4. Make the Cheesecake Filling: In a large bowl, beat the cream cheese until smooth. Add the granulated sugar and vanilla extract, mixing until well blended.
5. Add the Egg and Sour Cream: Mix in the egg until fully incorporated, then add the sour cream. Beat just until combined.
6. Fill the Cups: Spoon the cheesecake filling onto the Oreo cookie crusts until each cup is about ¾ full.
7. Bake: Place the muffin tin in the preheated oven and bake for 15-20 minutes, or until the cheesecake appears set and the edges are slightly golden.
8. Cool: Remove from the oven and allow the cookie cups to cool in the pan for about 10 minutes. Then, transfer them to a wire rack to cool completely.
9. Chill: Once cooled, refrigerate the Oreo Cheesecake Cookie Cups for at least 30 minutes to allow them to set properly.
10. Add Toppings: Before serving, sprinkle the crushed Oreos on top of each cheesecake cup for added texture and decoration.

These straightforward steps will help you create Oreo Cheesecake Cookie Cups that are guaranteed to impress!