Lay out a piece of parchment paper.
Spread cookie icing on the top of the Oreo cookie so it looks like a puddle of snow melted.
While the cookie icing is still wet.
Cut the mini Reese in half and lay the cut side down on top of the Oreo cookie.
Using two black sprinkles or something edible, place the eyes under the hat. Remember they don't have to be perfect, it's a melted snowman.
Using a long orange sprinkle, place the nose under the eyes. Doesn't have to be perfect.
Using two long brown sprinkles, place one on each side for the arms.
Using three or so round sprinkles, place the buttons toward the bottom of the snowman. Remember your snowman is melting so it doesn't have to be perfect just in the general area.
Allow cookies icing to dry for a few hours. Enjoy!