Melt the chocolate wafers in a microwave-safe bowl in the microwave for 30 seconds, let them stand for 5 seconds and mix. You may need to microwave an additional 30 seconds and stir until all chunks have melted. If you are using almond bark, be very careful. This can burn or seize up very quickly. Check every 10 seconds.
Use a paintbrush and paint a thick layer of chocolate around the inside of the mold. Make sure every area has been covered, all the way to the top of the mold. Let this firm up and repeat. You need this to be thick enough so it won’t break while you are working with it.
When the chocolate is completely dry, carefully remove from the mold. Add a heaping tablespoon of cocoa mix to the mold, followed by some Lucky Charms marshmallows. If your mold is large enough you can add a little more.
Warm a small glass plate in the microwave till it’s just warm, but not too hot to handle.
Take the mold that is filled and hold it to the bottom of the plate just till the chocolate melts slightly. Set it down and place an empty top on the top of the plate. Remove as soon as it begins to melt. Place the top on and hold together.
Using the brush, go around the seam to help seal it.
Heat the white chocolate in the microwave for 30 seconds and stir till there are no lumps. Using a spoon, drizzle some chocolate over the top. Place a couple of lucky charm marshmallows on the chocolate.
To serve, heat a cup of hot water or milk, place a cocoa bomb in the bottom of a mug and pour hot water or milk over the bomb and watch it melt. Stir to dissolve and serve with your favorite cookies.