CustomBrewing

A pretty seamless way to make custom brewing recipes. The only draw back is visual flickering whenever you modify the inventory while brewing, and that you cannot put any items that cant already be put inside of the slots of a brewing stand naturally. I made this in 1 day so its not very optimized but it doesn't modify any blocks other than the brewing stand and the only entities spawned in are armor stands at each brewing stand in the world (only summons the armor stand at brewing stands that players look at).