Add butter in a small microwave-safe bowl and place on glass turntable. Press “+30 SEC” then “Start” to melt butter. Meanwhile, cut biscuits into quarters and fill medium bowl with graham cracker crumbs.
Roll biscuit quarters into balls and coat with melted butter. Transfer to bowl with graham cracker crumbs and turn to coat.
Layer biscuit dough in medium microwave safe bowl with chocolate chips and marshmallows. Place bowl on glass turntable.Press “+5 MIN” then “Start” to cook monkey bread for 5 minutes. Let cool 1 minute, then serve.