Gather 12 (8-ounce) cups and place them on a clean countertop. Add 1 ½ tablespoons of crushed Oreos to the bottom of each cup.

In a large mixing bowl, whisk together the vanilla pudding mix and 2 cups of cold whole milk using a hand mixer for 2 minutes.

Carefully fold the entire container of Cool Whip into the thickened pudding mixture.

Layer 2 heaping spoonfuls of the pudding mixture into each cup on top of the Oreo base, followed by another layer of 1 ½ tablespoons of crushed Oreos.

Cover the assembled cups with plastic wrap and refrigerate for at least 1 hour.

Before serving, decorate each cup with three mini chocolate eggs and one Peeps Marshmallow Treat on top.