Add candy melts to three, small, microwave safe bowls. Melt in the microwave in 30-second increments, stirring in between until fully melted. This will take between 60-90 seconds.
Spoon about ½ tablespoon of each color into the bottom of each half-sphere mold. You will make 12 half-spheres.
Using the back of a spoon, gently swirl the colors together for a marble effect, don't fully combine them. Carefully, spread the melted chocolate to the sides of each mold. Freeze for about 10 minutes or until hardened.
Gently remove from the hardened half-spheres from the silicone molds. In 6 of them, spoon 1 tablespoon of each of the hot chocolate mix, add baking chips and mini marshmallows..
Add a bit og MELTED candy melts to the edges of the 6 bottom half-spheres and cover with the top spheres. Run a clean finger around the edge to remove any extra candy melt and smooth the edge.
Drizzle melted white chocolate on top and garnish immediately with sprinkles.
Freeze for 10 minutes or refrigerate until ready to serve.
To serve, place a cocoa bomb into a mug. Pour hot milk oveer it. Once the shell melts, stir with a spoon to fully combine. Serve and enjoy!