1. Prepare Pudding Base:

• In a large mixing bowl, add the dry instant vanilla pudding mix (or your chosen flavor).
• Pour in the 2 cups of cold milk (or the amount directed on your pudding package for a pie-filling consistency, which is often 2 cups).
• Whisk the pudding mix and cold milk together vigorously for about 2 minutes, or until it starts to thicken.

2. Let Pudding Thicken:

• Let the whisked pudding mixture sit for about 5 minutes. It will continue to thicken up during this time.

3. Fold in Cool Whip:

• Ensure your Cool Whip is fully thawed but still cold.
• Add the thawed Cool Whip to the thickened pudding mixture.
• Using a rubber spatula, gently fold the Cool Whip into the pudding until they are well combined and no streaks remain. Try to maintain the fluffiness.

4. Fold in Oreos (and Marshmallows if using):

• Coarsely crush the Oreo cookies, making sure to leave some larger chunks for good texture. Reserve about 1/4 cup of these crushed Oreos for garnishing the top later.
• Add the remaining (larger portion) of the crushed Oreo cookies to the pudding/Cool Whip mixture.
• If using, add the mini marshmallows now as well.
• Gently fold the Oreos (and marshmallows) into the creamy mixture until they are just evenly distributed. Be careful not to overmix, as this can make the Oreos too soft too quickly.

5. Transfer and Garnish:

• Transfer the prepared Oreo fluff mixture to a large serving bowl.
• Sprinkle the reserved 1/4 cup of crushed Oreo cookies evenly over the top for garnish.

6. Chill Thoroughly:

• Cover the serving bowl with plastic wrap.
• Chill the Oreo fluff in the refrigerator for at least 1 hour before serving. This allows the flavors to meld and the dessert to fully set and chill properly. Longer chilling (2-3 hours) is even better.

7. Serve:

• Serve the Cloud-like Oreo Fluff chilled, directly from the serving bowl. Enjoy the dangerously addictive deliciousness!