Put 4 ounces of red candy wafers in a microwave-safe bowl, 4 ounces of white candy wafers plus a few red candy wafers in a second bowl, and 8 ounces of white candy wafers in a third bowl.
Melt the candy wafers in the microwave at 50% power for one minute and then stir. Continue melting at 50% power in 10-second intervals, stirring each time, until smooth.
Drizzle the red and pink melted candy wafers in the heart shaped silicone mold. Top with a spoonful of melted white candy wafers.
Tilt and turn the mold to allow the melted candy to flow around inside it. Use the back of a spoon to fully coat the sides of each heart.
Allow the candy coating to harden.
Remelt the white candy wafers in the microwave and then add a second layer to the hot chocolate bombs making sure to get the sides coated so that they are stronger.
Allow the second coat to harden and then remove the hearts from the mold.
Warm a skillet over low heat and then remove from the heat. Rub the edges of a heart on the warm skillet to smooth them out.
Add two tablespoons of hot chocolate mix, one tablespoon of mini marshmallows and one teaspoon of sprinkles to the heart.
Rub the edges of a second heart on the warm skillet and then immediately place on top of the filled heart. Run your finger along the seem to smooth it out.
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Notes
To Use Hot Chocolate Bombs for Valentine's Day: Pour eight ounces of hot milk over the heart shaped hot chocolate bomb in a mug. Stir to combine.
My mold had nine hearts so I had one extra heart shaped cup. I like making the extra one in case one of the others breaks but you can only fill eight of the cups if you prefer.