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 after taste when eaten raw (unpeeled). Does this mean they are too old, or is it normal?
Will they have the same flavour when cooked?
I'm not sure whether I should cook something with them, or whether I should discard them.