Spray a 9’’ x 13’’ pan with non-stick spray or line with heavy duty aluminum foil greased with non-stick spray. If using foil let it drape over the sides of the pan for easy removal of bars.

Remove two cups of marshmallows and set aside.

Slice butter into thin slabs so it will melt quicker in the microwave.

In a large microwave safe container place the butter slabs and remaining marshmallows. Microwave for 2 minutes. Remove and stir until butter and marshmallows are melted and combined. Quickly mix in cereal and stir until it is combined. Add reserved marshmallows and stir until they are softened and partially melted. You do not want them to completely melt as they provide those delicious pockets of marshmallow goo.

Press mixture into prepared pan. You can butter your fingers to help press them into the pan with less mixture sticking to them or use the butter wrapper to push the mixture into the pan. Damp fingers also work to help press the mixture into the pan without getting it stuck to your fingers.

Let cool at room temperature for at least an hour.

If you used foil you can lift the treats onto a cutting board and cut into pieces.

Otherwise cut them in the pan.