Bake the cupcakes and allow them to cool.
While the cupcakes are cooling make your white frosting and color it green using green gel food coloring.
Using a spatula plop a pile of frosting on top of the cupcake, using a spatula shape it to have a squarish shaped head.
Add chocolate sprinkles on top for the hair.
Add one brown M&M or Reeses Pieces to each side of the head.
Add 2 candy eyes to the front of the face.