These little guys were a hit at my last Halloween party.
What you'll need:
white candy melts
a few drops of green food coloring
black gel frosting
Bake your own cupcakes (or buy them to cut your time in half), add some green food coloring to white candy melts, dip large marshmallows into the candy melt, before the marshmallow sets, push in mini M&M eyes, add some chocolate frosting hair (or use the black gel frosting), two green tic-tacs for neck bolts, and draw on a stitched-mouth with black frosting gel.