In some recipes, some ingredients could be ignored, for example, I have made an assemble line which just use stone to produce A, and when I am using A to craft B, in recipe tree there will be no need to show how to craft A step by step, just show stone to make A would be enough.

According to doing that, I think allow player to add recipes by their own will be enough to do that, in my example, I add a recipe: stone make A would be enough.