Why does a green ring appear around hard-boiled eggs?

and then simmer—not boil—for about 9 to 12 minutes, depending on size.

Once cooked, transfer eggs immediately to an ice bath or cold water. This halts the cooking process and helps prevent the green ring from forming.

Peeling the eggs becomes easier too when cooled quickly—another bonus.

For best results, use older eggs, which peel more easily than very continue reading …