There are a lot of nonsensical products out there, that promise a good hot chocolate.
Don’t do it.
I’ve used it for almost 12 years now, and it goes down well.
One spoon of Cocao and one spoon of lovely soft brown sugar for every cup of milk. Obviously, you need to make a paste before adding most of the milk but it’s not rocket science and barely more complicated than tipping boiling water into a sickly powdered milk drink.