Bake the cupcakes according to the box directions.
Transfer them to wire racks to cool.
Cream the butter in a medium bowl.
Slowly add in the powdered sugar, and milk as needed, until everything is incorporated and frosting is the right consistency.
Add several drops of green food coloring and whip a few more minutes to get an even color.
Roughly ice cupcakes to resemble grass.
Place 4 M&Ms on the center of the cupcake and slightly overlapping to make the head and body. We used the same color M&Ms for the body and a different color for the head.
Cut 2 small pieces of edible Easter grass to make the antennae.
Place 2 Flipz pretzels on each side of the M&Ms to make the wings.