Is It Safe To Eat Hard Boiled Eggs With A Green Ring? - Tasting Table
Briefly

Cooking hard-boiled eggs to perfection hinges on the timing; overcooking can lead to undesirable results, such as runny or rubbery eggs and a green ring around the yolk. This green ring, a harmless byproduct of a chemical reaction between yolk iron and egg white sulfur, signifies overcooking. Though safe to eat, these eggs might not be suitable for salads where presentation matters. A gentler boiling and steeping method can prevent this issue by controlling temperature exposure, leading to better texture and appearance in hard-boiled eggs.
Achieving the perfect hard-boiled egg depends on timing; too much or too little can lead to compromised texture, flavor, and appearance.
The green ring around a yolk is caused by a reaction between iron and sulfur due to overcooking, and although it is harmless, it affects texture.
To avoid the green ring, start eggs in cold water and bring to a boil, then let sit, a gentler cooking method.
Hard-boiled eggs with a green ring may not be best for salads or dishes as their appearance and texture may be affected.
Read at Tasting Table
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