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.
Give Eggs Time To Cool
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.
After boiling, let the eggs sit in the ice bath for at least 15 minutes, then peel them or refrigerate them (unpeeled) for up to seven days.
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.
Start with old eggs. Farm-fresh eggs will be harder to peel—it's a matter of their particular chemistry. To minimize frustration, save those straight-from-the-hen eggs for poaching or frying and use a carton of slightly older eggs, like the ones from the grocery store, when boiling.
While overcooking hard-boiled eggs does have its obvious drawbacks — rubbery dry whites and pale crumbly yolks — it actually does make them easier to peel.
Bring to a boil, then cover the pot and turn off the heat. Let the eggs cook, covered, for 9 to 12 minutes, depending on your desired done-ness (see photo). Transfer the eggs to a bowl of ice water and chill for 14 minutes. This makes the eggs easier to peel.
Once water is boiling, add the eggs and adjust the temperature to maintain a rolling boil. Start a timer for 12 minutes and prepare an ice bath. When the timer goes off, remove eggs from the pot and immediately place into ice bath for at least 10 minutes before peeling.
Bring water to a boil over high heat, then reduce heat to moderately high and cook eggs at a gentle boil, uncovered, 10 minutes. Pour off hot water. If using eggs right away, shake pan gently so eggs bump into one another (to crack shells).
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.
"Get them onto a spoon and drop them into the water", Gordon said, timing six minutes to boil the eggs. "Bring that [the water] to the boil, but don't water them ferociously, or you'll get a black line around the outside, boil them gently."
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.
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.
Here's a hard-boiled egg tip that we know to be true: Starting your eggs in hot, already-boiling water makes them easier to peel. In a column for Serious Eats, cookbook author and food columnist J. Kenji López-Alt found that "starting cold resulted in eggs that had just over a 50% success rate for clean peeling.
Put the pot over high heat and bring to a boil. Once the water is at a rolling boil, turn off the heat and cover the pot with the lid. Allow the eggs to sit in the hot water for the following times according to the desired doneness: 3 minutes for SOFT boiled; 6 minutes for MEDIUM boiled; 12 minutes for HARD boiled.
Soft-boiled eggs: For soft, runny yolks, you want to make sure to remove the eggs at 4 minutes. Medium-boiled yolks: Often described as “jammy”, this is where my preference is, right around 6-7 minutes. Hard-boiled eggs: The range for hard-boiled yolks is anywhere from 8 to 12 minutes.
Once the eggs are boiled they head for a dunk in an ice bath. An ice baths cools the eggs quickly which helps keep them safe. A clean container, ice and fresh water should be utilized to prevent cross-contamination.
According to The Kitchn, the first sign that your boiled eggs were left on the stove too long is if their yolks are a strange gray or white color, or seem to be falling apart. The other indicator that your eggs were over-boiled is if they smell like sulfur after you freshly peeled them.
If you're wondering how to tell an egg is hard boiled, set it on the counter and give a quick spin. Once it's moving, tap your finger on it to stop the spinning. Eggs that are cooked will spin easily and rapidly and stop quickly.