Add the chopped dark chocolate to a microwave safe bowl.
Microwave in 30 second intervals at 50% power, stirring between each interval, until about 90% melted.
Stir until completely smooth, then mix in the coconut oil.
Allow the chocolate to cool for 10–15 minutes so it thickens slightly.
Line a small baking sheet or tray with parchment paper.
Pour the nonpareils onto the parchment lined baking sheet and spread into an even layer.
Transfer the melted, slightly cooled, chocolate to a small piping bag.
Secure the top tightly using a binder clip, or similar clip, to prevent leaking.
Cut a very tiny opening at the tip of the piping bag.
Gently pipe small quarter sized rounds of chocolate directly onto the nonpareils.
Continue piping until the baking sheet is full.
Place the tray into the freezer for about 10 minutes, or until fully set.
Remove the candies from the baking sheet.
Spread the nonpareils back into an even layer and repeat with any remaining chocolate.
Store the finished candies in the refrigerator until ready to serve.