Melt 2 pounds of dark chocolate confectionery coating in the microwave until fluid. Do not over heat. Melt 1 minute, stir, 30 seconds, stir, and add 30 second intervals stirring after each one until fluid.
Pour confectionery coating into molds filling them to the top. Let molds sit for 30 seconds.
Pour out chocolate candy coating back into bowl you melted it in.
Scrape the mold using the dough scraper to create a clean edge around the mold.
Place mold upside down on parchment paper and in the fridge until chocolate is set up. It will release cleanly when set.
Repeat this process until all confectionery coating is used and shells are made.
Fill ½ of the chocolate spheres with marshmallows.
Seal chocolate spheres using preferred method above.