- let the balls of peppermint filling harden for about 5 minutes in the fridge before flattening them, that made it much easier and less sticky.
- split the batch of patties onto two separate sheets of wax paper, so you only have half of them out of the fridge while applying the chocolate coating. This maintains an optimal ratio of cold patty to room temperature chocolate, which I found to be key to a fun and attractive coating process. I put the whole pan back in the fridge halfway through coating to harden the remaining patties that were softening at room temp, and in the interim the chocolate hardened just a little too much, and the last few patties were really ugly and difficult to coat. Tragically, I had to eat them because they were too ugly to give away.
from seriouseats.com