Place butter in 4-quart microwavable bowl. Microwave, uncovered, on HIGH, for
about 30 seconds, or until melted. Stir in marshmallows and frosting until marshmallows
are coated. Microwave, uncovered, 2-3 minutes, stirring every minute, just until
mixture is smooth.
Fold in peanuts and popcorn until coated. Press mixture into pan.
Spread with chocolate glaze; cool.
Cut into bars.
Chocolate Glaze: Place ready to spread frosting in small microwavable bowl. Microwave,
on HIGH, about 30 seconds or until just melted.