Preheat the oven according to the instructions on the box.

Using a non-stick spray or butter grease the inside of your muffin pan. Set aside.

Place the Oreos on a cutting board and use a sharp knife to roughly chop them. Set ¼ of the chopped Oreo pieces to the side.

In a large mixing bowl combine the muffin mix, ingredients listed on the back of the box (most often eggs, oil, and water), and chocolate chips (if needed). Mix together.

Add the Oreo pieces (except for the portion you set aside). Fold them into the muffin mixture.

Spoon the muffin mix into the muffin pan, filling each cup about ⅔ the way.

Take the remaining Oreo pieces and place the on the tops of the muffin mix.

Bake according to the box instructions.

When done baking let the muffins cool for about 15 minutes and then remove from the muffin pan and let cool completely before serving.