Why Hard-Boiled Eggs Turn Green (and How to Avoid It)
Whether you like your eggs scrambled, sunny-side up, or hard-boiled, they’re a nutritional powerhouse. Packed with high-quality protein that aids in muscle growth and repair, eggs are also rich in vitamins, minerals, and choline, a nutrient vital for brain function.
They’re also low in calories and contain healthy fats, making them a perfect breakfast choice for both children and adults.
But if you’re a fan of hard-boiled eggs, you’ve likely noticed a green ring around the yolk at some point. Wondering what that is?
Don’t worry — it’s completely safe.
The greenish color comes from a harmless chemical reaction between sulfur in the egg white and iron in the yolk, caused by overcooking.
How to Prevent the Green Ring:
- Place eggs in a pot and cover with cold water (1–2 inches above eggs).
- Bring to a boil, then immediately turn off the heat.
- Cover the pot and let eggs sit:
- 9 minutes for soft yolks
- 11–12 minutes for firm yolks
- Transfer eggs to an ice bath for 5 minutes.
- Peel under running water for easier removal.
“Add vinegar or salt to the water to help prevent cracking.”
Storage tip:
Unpeeled boiled eggs last up to 1 week in the fridge. Peeled eggs are best eaten within 2–3 days