These are super yummy. I used the Hershey's Chocolate Cupcake recipe (on the back of their cocoa powder box). The recipe is at the bottom, if you want it. Just a word of warning, when it says the batter is runny, they mean it! It is really, really runny. But don't worry, it's supposed to be, and they turn out delicious!
After making the chocolate cupcakes, I made a simple ganache (1.5 parts chocolate to 1 part heavy whipping cream) and used an injector to pipe it into the middle. Then I took a tub of cool whip, died it green and added just a little bit of peppermint extract. I frosted the cupcakes with that, and put some crushed up mint cookies on top.
Finally, I added a little gravestone for each cupcake. For those, I took some grasshopper cookies and cut them into the shape of tombstones (the extra parts I cut off worked out great for sprinkling on top), and wrote RIP on them. I happened to have orange frosting on hand, so that's what they got.
Chocolate Mint Cupcakes