Preheat oven to 350 degrees (F). Lightly spray a 9" springform pan with non-stick spray.
In food process add oreo cookies, melt butter and stir together then press into pan (if needed, a little bit of milk will help).
Combine ingredients in mixer and add to crust. Bake 30 minutes. The cheesecake should be still slightly wiggly.
Optional: add sour cream topping and bake an additional 10 minutes
Remove cake from oven and gently run a knife around the edge of the cake. Place the cheesecake pan on a cooling rack and cool completely, then loosely cover the pan with saran wrap and chill for at least 8 hours.
Cheesecake will keep, covered in the fridge, for 5 days. Cheesecake may be frozen for 2 months. Thaw overnight before slicing.
