Start by melting down your candy melts in the microwave. Do this in 30 second intervals. Stirring after each, until melted down. and completely smooth.
Place 2-3 teaspoons in your silicone molds and smooth around the sides with a metal spoon. You want ever bit of the cavity covered by a smooth layer of chocolate.
Place in the fridge for 30 minutes.
Repeat steps 1-3 two to three times to create a thick outer wall.
Remove chocolate from molds.
Lay out on a cookie sheet and fill HALF of them with hot chocolate mix and sprinkles.
Pick up your empty halves and place the edge gently down on a hot plate to smooth out and melt, as shown. Plate should be heated in the microwave for 45 seconds, and reheated as necessary to maintain temperature.
Quickly place them on top of your half filled with hot chocolate. Hold tightly to seal.
Place in the fridge again.
Decorate with leftover melted chocolate and sprinkles.
Place in a mug and pour the hot milk gently on top of the hot chocolate bomb until it melts the chocolate shell and releases the filling.
Stir to combine, and enjoy!