In a mixing bowl, beat the softened cream cheese and unsalted butter until smooth and fluffy, about 2-3 minutes using a hand mixer. Gradually add in sifted powdered sugar until light and airy.

In a separate bowl, whisk together the milk and chocolate pudding mix until fully combined, approximately 1-2 minutes or until thickened.

Carefully fold the chocolate pudding into the cream cheese mixture until blended, then add vanilla. Gently fold in the whipped topping.

Place the chocolate sandwich cookies in a food processor and pulse into fine crumbs, retaining some larger chunks for texture.

In a 9x13 inch baking dish, spread half of the crushed cookies, pour half of the creamy filling, and repeat layers with remaining ingredients.

Cover tightly with plastic wrap and refrigerate for at least 2 hours to firm up.

Remove from fridge, add candy-coated chocolate pieces and marshmallow chicks, and enjoy!