I want to add check list of ingredients

So you have ingredients data that needs imported?

I’m not sure if this importer allows that sort of importer. I may be wrong but the last time I used it this plugins main focus is re-importing of exported posts. You need an importer that adds to existing posts, specific custom fields meta or taxonomy meta.

I provide CSV 2 POST which has the ability to do this by adopting existing posts and updating them with new criteria whatever it may be.