Place the cookies in a food processor. Pulse a few times until the cookies are broken down into small chunks.
Place the marshmallows and butter in a large microwave-safe bowl. Cook them for one minute. If they aren’t fully melted cook them for another 30 seconds.
Add the crushed Oreos to the melted marshmallow and stir until combined. Transfer the mixture to the baking pan and smooth into an even layer. Let it rest for ten minutes or until set. Slice into bars and serve.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.