Prepare an 8×8 inch square pan with parchment paper
On a cutting board, roughly chop the oreo cookies to make two cups; set aside
In a large saucepan, melt the butter completely
Once the butter is melted, add in 6 cups of mini marshmallows and stir until completely melted
Remove the saucepan from the heat and add the and stir in the Rice Krispie cereal and chopped oreo cookies into the marshmallow mixture and mix until fully combined
Pour the mixture the prepared pan and allow it to cool completely before cutting
Once they are ready to cut, remove the Cookies and Cream Rice Krispie Treats from the pan and cut into desired size