Crush the 36 Oreo cookies in a large bowl and mix in 1/2 cup 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 8 oz softened cream cheese, 1/4 cup granulated sugar, 2 tablespoons milk, and 1 teaspoon vanilla extract until smooth and creamy. Fold in 1 1/2 cups whipped topping and spread this luscious mixture over the chilled crust.

In a separate bowl, whisk together the instant vanilla and chocolate pudding mixes with 3 cups cold milk until thick and creamy. Spread the chocolate pudding over the cream cheese layer, followed by the vanilla pudding.

Dollop the remaining 1 1/2 cups of 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.