It's best to store hard-boiled eggs with the shells on, as the outer layer serves as a protective barrier. Plus, they're easier to peel once they've chilled in the fridge for a while. It's a win-win! Transfer hard-boiled eggs to a bowl of cold water immediately after cooking to help them cool down faster.
Hard-cooked eggs may be difficult to peel if they are very fresh. This is because an egg shrinks inside during storage, which pulls the inner membrane away from the inside of the shell.
The quick cooling of the hard-boiled eggs causes the egg whites to contract, freeing them from the membrane. If you let them cool for about 15 minutes, the peeling is much easier.
A boiling start for 30 seconds to a very gentle simmer for 13 minutes, then an ice bath at the end makes perfect, easy-to-peel hard-boiled eggs.
This is because the egg white or “albumen” in a fresh egg has a relatively low pH level, making it acidic. When cooked, these fresh egg whites bond strongly to the inner shell's membrane. As an egg ages, the pH level rises and the inner membrane is less likely to bond to the albumen, so the shell peels off much easier.
Adding white vinegar or apple cider vinegar to your pot of water allegedly results in softer, easier-to-peel eggshells. That's because the acid in vinegar dissolves some of the calcium carbonate that makes up the egg's hard exterior.
Baking Soda
According to our friends at Delish, adding a teaspoon of baking soda to your boiling pot of water will help the shell peel off seamlessly. Why? The alkaline in the baking soda will help your egg whites loosen up from the shell, making it easier to peel.
Adding a teaspoon of vinegar to the water may help keep egg whites from running out if an egg does crack while cooking. Also some people find adding 1/2 teaspoon of salt to the water helps prevent cracking as well as making the eggs easier to peel.
Ideally, peel the eggs as soon as they're cool. Start at the broad end, and hold the egg under running water to loosen any bits of stubborn shell clinging to the sides. Another thing to keep in mind is the freshness of your eggs.
Some people prefer to peel their hard-boiled eggs before storing – and that's A-OK. You'll just need to take a few extra steps: Transfer hard-boiled eggs to a bowl of cold water immediately after cooking to help them cool down faster. Peel the eggs under running water.
Keeping Hard-Boiled Eggs Fresh
For maximum freshness, leave them in their shells until you are ready to eat or prepare. The shell will help to protect the egg from bacteria, and can help prevent them from absorbing odors from other foods in your refrigerator.
Apparently super fresh eggs are difficult to peel because the pH of the white is more acidic which causes it to adhere to the shell membrane more tightly. Two solutions here – use older eggs or add a little bicarb soda to the cooking water to increase the pH.
The vinegar in the water makes the eggs easier to peel. Here's why: The vinegar's acid not only dissolves some of the calcium carbonate in the shell, it also helps the whites set faster. Running the hard-boiled eggs under cold running water as you're peeling, meanwhile, helps the shell separate from the membrane.
Give the eggs at least five minutes in the ice bath before you try to peel them—letting them cool may help make it easier to peel them, but it's also so you don't burn your hands.
You might have heard that you should drop your eggs into room temperature or cold water and then bring the water to a boil. This is a myth. In our tests, bringing the water to a boil first and then lowering the eggs into the bath made for easy peeling and more accurate timing.
To avoid getting a green yolk, cook your eggs just long enough to reach the desired doneness—no more. And quickly plunge the cooked eggs into cold water to stop the cooking process and minimize the iron-sulfur reaction. Some people also say that the cold-water plunge makes eggs easier to peel.
Making hard-boiled eggs should always begin with cool water. Bringing the water and eggs up in temperature together helps promote even cooking and prevent cracking. Follow this tip: Always start with cold water.
Once the water is boiling, reduce the heat to low (so that there's no bubbles) and use skimmer to gently and slowly add the eggs to the water. Then, turn the heat back up to a boil. Set a timer and cook the eggs for 6 to 7 minutes for soft-boiled eggs and 12 to 14 minutes for hard-boiled eggs.
Place eggs in a large saucepan. Cover them with cool water by 1 inch. Slowly bring water to a boil over medium heat; when the water has reached a boil, cover and remove from heat. Let sit 12 minutes.
Peel the Egg
After the shell is removed, briefly rinse the egg under water to remove any small bits of shell that may still be attached. Any eggs that you do not plan to eat immediately should be left unpeeled and refrigerated. Unpeeled hard-boiled eggs will stay good in the refrigerator for up to a week.
Add salt and vinegar to the water.
The salt permeates the shell a little bit, and the vinegar helps to break down the shells, making them easier to peel.