Process Oreo cookies in a food processor to make fine crumbs.

Melt butter in a microwave or saucepan.

Combine Oreo crumbs and melted butter in a pie plate.

Press the crumb mixture firmly and evenly onto the bottom and up the sides of the pie plate to form the crust.

In a mixing bowl, blend cream cheese, Nutella, and vanilla extract until smooth and creamy.

Fold in thawed whipped topping until well combined.

Pour the cream cheese mixture into the prepared Oreo crust.

Refrigerate for at least 2 hours, or until set.

Slice and serve chilled.