I tried this recipe for a Christmas party a couple weeks ago – oh, so yummy! I cut mine out in little circles with an herb jar lid. I would caution, though, that it's not necessarily a cookie children would like – it has a very adult taste, with the bitter cocoa very delicately offset by the light peppermint filling.
Where have the days gone? 
Sounds scrumptuous. I quite like dark chocolate.
I'm going to hang onto this one for next year!