Add blue chocolate to bowl and melt in microwave in 30 second increments stirring in between until creamy and smooth.

Fill the molds with melted chocolate making sure to only fill the sides of the mold all the way to the top and keeping the inside hollow. Use the back of a spoon to guide the chocolate throughout the mold.

Place in the freezer for about 10-15 minutes or until they are easy to pop out. Very carefully remove the chocolate from the mold. If they don't pop out easily, place back in freezer for a few more minutes.

Using one chocolate half, add the white chocolate cocoa mix and some mini marshmallows on top. Heat a plate in the microwave for about 15 seconds, carefully taking it out cause the plate will be hot. 

Take the other chocolate half and smooth and press the open part onto the hot plate for a few seconds to melt the chocolate and twist a bit to smooth the edges.  Connect the two half pieces of chocolates together and seal together. 

Decorate by drizzling the melted blue chocolate over top and adding the snowflake sprinkles and allow to dry.

Watch your hot cocoa bomb explode right before your eyes with the magic touch. To use a hot cocoa bomb, carefully place in the bottom of a cup. Heat milk separately in microwave or on stovetop. Pour piping hot milk in cup over top of hot cocoa bomb and watch it open up. Stir and enjoy!