After baking the cookies, and letting them cool, I outlined each one with thick green icing.
Then I used a thinner icing to fill it in.
While the fill was still wet, I plunked in some large eyes…
…and then some small eyes.
And when it was really, really hard, I went back with the thick green icing to pipe on some warts!
There you have it! Simultaneously gross and delicious. (I love Halloween.)