

Could it be Bootleg?
I wanted to read more plot details to see how closely it matched your description but all the synopsis are a bit vague. I saw the TV show as a kid. Apparently there was a manga and an anime made from it as well. In this one they’re more specifically focussed upon chocolate than all confectionery generally but it sounds like that may have featured too.
Those all sound good. Sorry that doesn’t help at all, but hey I’m rooting for you.