Why do hard-boiled eggs have a weird green ring around the yolk? | March 2, 2025
Annonce:
The greenish ring that sometimes forms around the yolk of a hard-boiled egg is caused by a chemical reaction between sulfur in the egg white and iron in the yolk. This reaction typically occurs when eggs are overcooked.
Advertisement:
When eggs are boiled too long or at too high of a temperature, the sulfur in the egg white reacts with the iron in the yolk to form iron sulfide, which has a greenish-gray color. The longer the eggs are cooked, the more likely this reaction is to happen, especially if the eggs are cooked at a high temperature for a prolonged period.
To prevent the green ring, you can try:
continued on next page
Advertisement:
