Just wanted to share a hidden location where I found a sword recipe.
This is roughly the area where it is located.
Down on the beach after you kill the drowners near the chests, head to this rock and look slightly to the left of it.
You should be able to see this rock formation after looking around for a second.
The chest is on the right side of the formation, you will have a second or less to open and loot it when you get close, otherwise you will be teleported for 'reaching the worlds end.'
This is the recipe I got from the chest. I do not know if you will get the same one, but hopefully you do.