A common method is rolling the eggs under slight hand pressure on a flat surface. This causes the shell to crack all over, making it easier to peel the shell and it's membrane off the egg.
Once you've gently lowered your eggs into boiling water—and remember, there should be enough water to cover the eggs by at least one inch—let them cook for 10 to 11 minutes, depending on size. In her battle-testing of Korbee's preferred method, Jampel noted that his 10-minute boil produced "perfect specimens."
Chef Ramsay opts to boil his eggs for four and a half minutes to keep the egg's center slightly soft. When your eggs are finished boiling, drain the water and run the eggs under cold tap water in the pot. According to Chef Ramsay, cooling the eggs as quickly as possible prevents their yolks from turning gray.
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.
Shocking your recently boiled eggs by submerging them into a bowl of ice water is key. 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.
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. For this reason, a hard-cooked egg will peel more easily if it has been stored for 1 or 2 weeks before it is cooked.
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.
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.
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.
Lower your eggs straight from the fridge into already-boiling water, or place them in a steamer insert in a covered pot, steaming at full blast on the stovetop. If boiling, lower the heat to the barest simmer. Cook the eggs for 11 minutes for hard or six minutes for soft.
?? Issue: The membrane sticking to the shell and white of an egg is the #1 reason eggs tear and fall apart when peeled. The thin translucent layer between the shell and the egg white is called the membrane.
Why this works: The acidity of the lemon juice helps keep the shells intact as the eggs cook. Bonus--it also makes them easier to peel when you're ready to eat.
These two hacks were tested to see which of them actually work. Adding vinegar to boiling water made it easier to peel. Adding baking soda made it almost impossible to peel.
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.
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.
Boil for 6 – 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 cool running water to stop the cooking. This will also help the eggs peel easily.
According to the Food and Drug Administration, you can keep hard-cooked eggs in the refrigerator for up to seven days after they have been cooked. 1 (Here's the best way to make them.) And it doesn't matter whether the eggs are already peeled or still in the shell. Either way, they will last for a week.
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.
NaCl or salt is added to the water when boiling eggs as the addition of salt or other non-volatile solid help in reducing the vapour pressure of the liquid. Which in turn increases, the boiling point i.e the temperature at which the vapour pressure equals the atmospheric pressure.
A soft boiled egg is boiled for a shorter amount of time, typically 4-6 minutes, so that the yolk remains runny while the white is only partially set. A hard boiled egg is boiled for a longer amount of time, typically 10-12 minutes, so that both the yolk and white are fully cooked and solid.