Gather ingredients and equipment. ( 1/2 cup butter, 2 bags of marshmallows, 8 cups of Rice Krispies Cereal, approximately 15 Oreo cookies and a pan.)
Crush your Oreos.
Melt the 1/2 cup of butter on the lowest heat until all the butter is melted.
Add the marshmallows.
Stir until the marshmallows are completely melted.
Remove from heat.
Add the Rice Krispies and Oreos. Stir to combine
Pour into desired pan.
Refrigerate for about 20 minutes. Either cut treats into squares or just spoon out. Eat & enjoy!