Setting an Item to be craft-able

I've been working lately on a new mod I want to release, and MCreator is amazing in all its extent. Needs a few tweeks but it is still very nice, however, I want to make an item out of another item. The added one item that I already created which was fine, not a hitch. I went to add the second item and notice I can't give it a crafting recipe. Why can't I add a crafting recipe to an item? Thank you.