I have the croissants craft in my specialty goods store but I don't have the ability to make butter yet. I'm level 18 and according to the guide butter will show up in the dairy at level 22. Looks like croissants aren't needed for the goals though at least. I don't have the gluten free cake craft (which I also wouldn't be able to make yet).
Edit: croissants are showing up in my delivery requests for the plane which is annoying since I can't make them yet. I had this issue with potpourri too - it showed up in delivery requests for quite a while before I got to level 18 and then the craft finally showed up in my dehydrator.