This method ensures the eggs cook through without the excessive heat that causes the ferrous sulfide to form. The quick cooling also helps make the eggs easier to peel.
So, Is It Safe to Eat?
Yes, the green ring is completely safe and an indicator that your egg has been overcooked. The color change is purely a cosmetic issue and does not affect the egg’s safety or nutritional value. While the overcooked yolk might be slightly drier and have a sulfurous odor, the egg is still perfectly fine to eat. It’s a useful visual cue to help you perfect your future egg-cooking technique.
