Place the Oreo cookies in a large zip top bag and close it. Roll a rolling pin over it to break it up into smaller pieces. You can alternatively roughly chop the cookies with a knife or use a food processor and pulse it into smaller pieces.
Set aside 2 cups of crushed Oreos to use later as topping. In a large mixing bowl, combine the chocolate fudge instant pudding mix with cold milk and whisk it together until it thickens.
Fold in the whipped topping until fully incorporated into the pudding.
Add the mini marshmallows, crushed Oreos, and semisweet chocolate chips. Fold it together with a rubber spatula.
Cover with plastic wrap and place in the refrigerator to chill for 30 minutes to an hour for the cream to thicken and cookies to soften.
When ready to serve, top with the remaining crushed Oreos. Enjoy!
To make a fun dirt fluff, top with gummy worms and fine Oreo crumbs.