You have two choices when it comes to peppermint bark: If you’d like your bark to be shiny and snappy at room temperature, you must temper the chocolate. The process isn’t complicated, but you’ll need an instant-read thermometer and a bit of patience. But you can also leave tempering to the professionals and make the bark without tempering: Simply microwave both chocolates until melted, assemble the bark as instructed then transfer it to the fridge to harden. You may encounter a bit of condensation and melting when you serve it, but it will still taste great. Be sure to use good-quality bar chocolate instead of chips for more reliable results and better flavor. Look for oil-based peppermint extract, as the water in alcohol-based extracts can cause the chocolate to seize.