Place a double boiler over a pan of simmering water
Add chocolate wafers to the top of the double boiler
Use a heat-proof spatula to stir constantly until 90% of the chocolate is melted. Using hot pads, remove the double boiler from the pan. Then place it over a cool pan to continue to melt the chocolate.
Once all the chocolate is melted, scrape the melted chocolate into a bowl.
Using a spoon, start filling the molds with the melted chocolate. Be careful to fill up the top edges.
Once all the half spheres are filled, place the silicone mold on a baking sheet and place in the refrigerator for 15 minutes.
Carefully remove chocolate from molds.
Then, fill the bottom half of the spheres with 2 teaspoons of hot cocoa mix. Add marshmallow and/or other fillings.
Heat a heat-proof plate in the microwave until hot to the touch. Then, gently place the top half-sphere with the open side face side down on the hot plate. Let it melt just for a few seconds so it will adhere to the bottom half.
Place the top half of the sphere's melted edge on the bottom half lining up the edges.
Return to refrigerator for 10 minutes.
While the bombs are chilling, prepare toppings and decorations.
If desired, decorate your chocolate bombs with melted white chocolate, candy melts, sprinkles, and/or candies.
To serve, place one bomb in a large mug. Slowly pour eight ounces of medium-hot milk over the cocoa bomb.
You can also serve by dropping the cocoa bomb into warm milk.
Enjoy!