What is a hot chocolate bomb? Individual chocolate spheres are filled with cocoa mix and marshmallows. You place the “bomb” in a mug, pour 8-10 ounces of hot milk, water or coffee over it to dissolve the chocolate and – like magic – watch the marshmallows float to the top. A quick stir mixes everything together.Small bombs - $4.00Large bombs - $6.00Min. order of 4**Due to the popularity of this product, please allow extra processing/production time.