Why Do Hard-Boiled Eggs Sometimes Get a Green or Gray Ring Around the Yolk?

How to Avoid This Problem

To make perfect hard-boiled eggs, follow these tips:

• Do not boil eggs for too long

• Cook them for about 9–12 minutes only

• After cooking, put eggs in cold water immediately

• Avoid very high heat for a long time

Cooling the eggs quickly stops the chemical reaction and keeps the yolk yellow.

Final Thoughts

The green ring around hard-boiled eggs is a common kitchen mistake, not a danger. With the right cooking time and proper cooling, you can make perfect eggs every time without the strange color around the yolk.