You can create a recipe for any* item, regardless of if it is considered craftable or not. By definition, it becomes craftable once you add a recipe.
(*I expect there to be some limitations on unobtainable items, e.g. invisible bedrock)
#how to make recipes for items that cant be crafted?
vestal steppe
vestal steppe
Give it a try and see!
Did you receive any errors within the content log for the recipe?
Ah, then it worked with a regular apple?
Strange, the recipe provided worked as-is
I suspect your behavior pack is not recognizing the file, or is not recognizing that you made any changes
Where did you place the JSON file for this recipe?
Are you testing this in a singleplayer world?
Assuming this is a development behavior pack, and you have only one with that pack's UUID—can you check your world's behavior_packs folder and make sure a copy of your pack is not there? (I am unsure of where else to troubleshoot)