MICROWAVE butter in large microwaveable bowl on HIGH 45 sec. or until melted. Add marshmallows; toss to coat. Microwave 1-1/2 min. or until marshmallows are completely melted and mixture is well blended, stirring after 45 sec.
ADD cereal and chopped cookies; mix well. Roll into 18 balls.
USE thumb to make 2 indentation in center of each ball. Split Mini OREO Cookies in half. Reserve plain halves for snacking or another use. Press remaining cookie halves, creme-sides up, into cereal balls for the eyes. Decorate with gel to resemble bloodshot eyes.