Clean your radishes and trim off the bottom to make a flat bottom to stand on end.
Trim greens so there are enough to grab, but not so much that they droop into your finished radish.
Very slowly melt the butter in the microwave. Use the lower power settings. Your goal in melting the butter is not a transparent yellow, but rather a muddy white. If you over-melt your butter, put it in the fridge to firm a bit and stir/melt until you get the right consistency. You want it a dipping consistency, but not so thin that it runs right off the radish.
Dip the clean, dry radish into the partially melted butter. You can dip a couple of times if you feel that the coating isn't good enough.