Funny you should mention, @Yoda. I recently bought some of those balls from my farmer's market. I knew they were hot chocolate, but that's all I knew. There was no information about what was inside. Also, I had no idea how to prepare them. Milk or water? Microwave? How full to fill cup so that there's enough for the ball, but not to overflow?
So the result was less than stellar because I made some incorrect choices. And the experience was sufficiently disturbing that I haven't tried again.
Maybe I should go try one now. 🙃
Edited to add: Some instructions for newbies woulda helped.