Theese are a big thing here in Norway as well. If I had time and more moulds I could have sold a lot more.
I’m making these four varieties for now: Dark, Milk, Dark & milk, White & dark (“snowballs“). Unfortunately my polycarbonate moulds only arrived today, so I have been working with Silikomart moulds (soft silicone half spheres). I fill them with chocolate, empty them, wait a bit and fill/empty them a second time to get them thick enough. This way it’s easy to have two types of chocolates (dark/milk and so on).
My issue with them is why put instant hot chocolate inside? If you use the right type of good quality chocolate it should be enough. So that’s why I only make them with chocolate and don’t have powder inside (but I do put mini marshmallows inside).
I have tried different couvertures the last few years for different variety’s of hot chocolate (grated, blocks on sticks and now bombs). My conclusion so far is that Manjari and Jivara from Valrhona are the best ones, and melts nicely in hot milk. Not found any from Callebaut, Cacao Barry, Casa Luker or Agostoni that works as well as Manjari and Jivara.