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

  1. Don’t Overcook
    Boil for only 9–12 minutes, depending on size
    Use a timer — don’t guess
  2. Cool Quickly
    Immediately transfer boiled eggs to a bowl of ice water for at least 5 minutes
    Stops the cooking process and minimizes the iron-sulfur reaction
  3. Use Medium Heat
    Bring water to a gentle boil, then reduce to a simmer after adding eggs
    Avoid rolling boils — they make eggs bounce and crack

     

  4. Start with Room-Temperature Eggs
    Cold eggs from the fridge are more likely to crack when dropped into hot water
    Let them sit

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