Witch Malady's conversation is long and tedious. Items can only be purchased one, and may only be cooked one by Maplestory Mesos one. Cooking one item means moving through 5 or 6 dialog boxes (and selecting an alternative in each, which means you can not actually spam the NPC Chat crucial). And you need to cook up a dozen intermediate items before you're able to make a single Stew, which is pretty much the only among Malady's concoctions that is still helpful.
The approach is long and it is painful and it gives an edge to individuals who are willing to break the rules and macro the Maple M Mesos procedure into their keyboards or controllers.
I believe that collecting the required materials is dull enough, therefore the crafting process can be streamlined without creating the entire occasion a "freebie."
The simplest fix is to include a "how many do you want to Maplestory Details buy/make?" Question to Malady's conversation right before she takes your items and provides you your benefit and exp. She will have to check that you have sufficient stuff, and that you have enough space in your inventory for the rewards, before she performs the trade.