Smell them.Then boil 20 min. I have green beans I canned in 06 and they are fine.
I have a recipe I made up that we love.2 jars of green beans,1 can mixed vegetables.
mix 1 can cheddar cheese soup,1 can cream of chicken soup, 1/2 can French's onions,1/2 envelope onion soup mix.
mix with vegetables.Top with rest of onions.
My version of green bean casserole.Bake in casserole dish 1/2 hour -45 min.