how do you boil hard-boiled eggs so they don’t turn green?

The discoloration forms due to a reaction between the sulfur in the egg white and the iron in the yolk when the eggs have been cooked too long or at too high a temperature. Cooking the eggs in hot, not boiling water, then cooling them immediately, minimizes this.

How do you prevent boiled eggs from turning green?

To avoid green eggs, hard-boil instead of hard-boiled eggs:

  1. Place the eggs in a single layer in a saucepan. …
  2. Cover pot and bring to a boil; turn off the burner.
  3. Let stand 15 minutes for large eggs (12 minutes for medium eggs and 18 minutes for very large eggs).
  4. Drain.

How to boil an egg without the yolk turning GREY?


  1. Cover the raw eggs with cold water and place the pan over high heat.
  2. As soon as the water comes to a boil, set a timer for 5-7 minutes.
  3. Immediately drain the water and rinse with cold water.

Why are my hard-boiled eggs hard to peel?

The fresher the eggs, the harder they are to peel. This is because the egg white or the “endosperm” in a fresh egg has a relatively low pH, which makes it acidic. …As an egg ages, the pH level increases and the inner membrane is less likely to bind to the albumen, so the shell peels off much more easily.

How do you know if a hard-boiled egg is bad?

A spoiled hard-boiled egg can have a characteristic and unpleasant odor. If the egg still has the shell, you may need to break it open to assess the smell. Many people worry if the yolk of a hard-boiled egg is greenish-gray in color.

Is it okay to eat overcooked hard-boiled eggs?

Do not eat overcooked eggs. Here’s why. When you boil eggs, hydrogen sulfide – a poisonous gas is released into the egg white. …if you’ve noticed that overcooked eggs have a green coating on their yolk, indicating that you shouldn’t eat them.

Can you eat 2 week old hard boiled eggs?

Culinary Fact: Hard Boiled Eggs can be stored in the refrigerator for up to a week. Hard-boiled eggs, peeled or unpeeled, are still safe to eat for up to a week after cooking. Store them in the fridge, and you should remember to write the boil date on each egg to know if they are still good!

What happens if you boil eggs for 20 minutes?

The inside of an egg is protected by the shell and several membranes, but if the egg has spent enough time floating in turbulent, bubbling water, the physical stress on the egg – the shell, the white and the yellow – possibly can crumble and fragment.

How long should eggs be boiled?

Boil for 6 to 7 minutes over medium-high heat for perfect hard-boiled eggs. Using a slotted spoon, transfer them to a large bowl of ice water and let them cool for a few minutes. Or you can place them under cold running water to stop the cooking.