microwave butter in 4qt microwaveable bowl on high 45 seconds or until melted.

add marshmallows;toss to coat.

microwave 1 1/2 minutes or until marshmallows are completely melted and mixture is well blended, stirring after 45 seconds.

add cereal;mix well.

press firmly into greased foil lined 13x9 inch pan.

cool,cut into 24 squares