I have some walnuts which were picked up from under a local tree, left to dry for a while, and shelled. They look moderately old, but haven't become shriveled or gone moldy. Some have a kind of bitter ...
I have some walnuts I found in the back of my cabinet that are probably 5 years old. The packaging says best if used by 2010. I tasted them and they taste alright, maybe a little tartish but I don't ...