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 mind. I was wondering if walnuts and other nuts actually ever go bad considering that they are dry.
Do nuts ever go bad
nutsstorage-lifetime
Best Answer
Yes, nuts are very fatty, and they will eventually go rancid— if this is the case, they will taste very poor. They can also dry out, or in more rare cases (especially if stored improperly) be infested with insects or molds.
Generally, they should be good for six months to a year at their best flavor, depending on the variety (in the shell).
Five years is a little long. I am not sure I would want to eat nuts that old.