3 tbsp. butter
25 lg. marshmallows or 3 1/2 c. mini marshmallows
5 c. Trix cereal

Grease square 8"x8"x2" pan. Place butter and marshmallows in large microwavable bowl. Microwave, uncovered on high for 1 minute and 30 seconds to 3 minutes. Stir occasionally until mixture is melted and smooth. Stir in cereal. Press mixture into greased pan; cool. Cut into 2" bars.