Line a sheet pan with parchment paper.
Add the dark chocolate chips to a small microwave-safe bowl. Microwave on high for 30 seconds. Stir. Microwave again for an additional 30 seconds. Stir again. By this point, your chocolate should be smooth and shiny. If there are still large lumps, microwave for an additional 15 seconds and stir again.
Pour the chocolate onto the prepared parchment paper and spread it out until it is 1/4” thick. This is easiest to do with an offset spatula.
Add any sprinkles, candy, or decorations while the chocolate is still wet— work quickly as it will start to harden immediately.
Repeat with the remaining chocolate flavors, sprinkles and toppings.
Transfer the chocolate bark to the freezer and allow it to set for at least 30 minutes.
While the chocolate bark is still frozen, break it into large pieces with your hands (or you can use a fork or knife by just poking it through the chocolate and it will break into large pieces).
Store in an airtight container in the refrigerator for up to 2 days.