Crush the Oreo cookies in a large bowl and mix in melted unsalted butter. Press this mixture firmly into a 9×13-inch baking dish, then chill in the fridge for 15-20 minutes until it firms up.

Beat together the softened cream cheese, granulated sugar, milk, and vanilla extract until smooth and creamy. Fold in the whipped topping and spread this mixture over the chilled crust.

In a separate bowl, whisk together the vanilla and chocolate pudding mixes with cold milk until thick and creamy. Spread the chocolate pudding over the cream cheese layer, followed by the vanilla pudding.

Dollop the remaining whipped topping on top of the pudding layers. Decorate your dessert with festive Christmas sprinkles and Mini M&Ms or holiday candies.

Cover your dessert with plastic wrap and refrigerate for at least 4 hours or overnight.