Place Oreo cookies in a food processor and blend into crumbs. Set aside.
In a large mixing bowl, beat softened cream cheese, butter, and powdered sugar until smooth.
In a separate bowl, whisk 1½ cups of milk and the vanilla pudding and refrigerate for 5 to 10 minutes until soft-set.
In a separate bowl, mix 1½ cups of milk and the chocolate pudding until combined and refrigerate for 5 to 10 minutes until soft-set.
Add half of the cream cheese mixture to vanilla pudding and mix until well combined. Fold in half of the container of whipped topping. Stir in a few drops of green food coloring (small amounts at a time to reach desired color).
Add remaining half of cream cheese mixture to chocolate pudding and mix until well combined. Fold in the second half of the container of whipped topping.
In small cups, layer chocolate pudding, cookie crumbles, green vanilla pudding, and cookie crumbles. Repeat until filled to the top.
Add 3 monster fingers, candy eyes, and gummy worms to the top of each cup. Enjoy!