Pop your blueberries in a freezer for 10 minutes. This way the chocolate will instantly firm up on blueberries.
Melt the chocolate in a microwave.
You can coat blueberries in two ways: the first method is to prick the blueberries on a toothpick and dip them into the chocolate. Once coated fully, you can use the paper cups to hold blueberries upward so the coating is perfectly round.
The second method involves placing some of the chocolate on the baking sheet lined with parchment paper. Add a few blueberries on top of the chocolate and cover with some more chocolate.
Freeze the blueberries until the chocolate is firm.