What I would like to suggest is that when I open each item on the recipe that the dialogue box would show the amount in inventory. That way I could pull up a recipe from my files. Check each item and have it show what I have in inventory. If it shows zero, I know that either I have none in inventory or no match and I can fix before I brew and remove from inventory.
It would also be handy to be able to pull up a recipe, check each item and know whether I need to get more supplies or that I have what I need on hand and can put that brew at the top of the que.
In addition, when you do a remove from inventory, it would give notice that you have done so in some way or would pop up a dialogue box notifying you that you have already done this and do you want to continue if you try to do it again.