Thin Mints.
*Please note - you are never supposed to add anything to the coating that has water in it (i.e. peppermint extract). Water and chocolate do not get along. However, I tested the waters (no pun intended) and since it was such a small amount, I got away with it. Just note, your coating may become clumpy and thick after adding the extract, making it very hard to dip WITHOUT adding the shortening.