Print Friendly, PDF & Email

Have you ever cracked open an egg, expecting to find a sunny yellow yolk, only to discover a mysterious green hue instead? The phenomenon of greenish egg yolks can be perplexing, but fear not—it’s a fascinating and entirely natural occurrence with a simple scientific explanation.

The appearance of greenish yolks typically occurs when hard-boiled eggs are cooked at too high a temperature or for too long. This causes a chemical reaction between the iron in the egg yolks and sulfur in the egg whites, resulting in the formation of ferrous sulfide. Ferrous sulfide is responsible for the greenish color and is harmless to consume.


To prevent green yolks, try the following tips:

  • Use gentle heat when boiling eggs.
  • Avoid overcooking eggs.
  • Immediately cool boiled eggs in ice water after cooking.

Understanding this culinary enigma ensures your next egg dish will be perfectly delicious and visually appealing.


By uvu44

Leave a Reply

Your email address will not be published. Required fields are marked *