Measure the cereal out into a large bowl, set aside.
In a small sauce pan, heat your butter on low, stirring constantly until the color of the butter turns a golden brown and it gives off a nutty aroma.
Immediately transfer to a large microwave safe bowl.
Pour 3/4 of the bag of marshmallows into the bowl and stir to coat with the melted butter.
Place the bowl to the microwave and cook for 30 seconds and then stir.
Repeat one more time for 15 seconds or until the marshmallows are mostly melted.
Pour the marshmallow mixture into the bowl with the Rice Krispies and stir to combine.
Once everything is combined, add the remaining marshmallows to the mixture and mix until evenly distributed.
Gently press into a greased 9x9 or 9x13 pan with damp hands.
Allow the treats to set up prior to cutting.