It happens to almost everyone in the kitchen. You drop an egg into the pot, and within moments the shell splits open and the white starts seeping into the water. The first thought that strikes is whether the egg is still safe to eat. The reassuring answer is that there is no need to panic. An egg cracking while it boils is perfectly normal, and in most cases it remains completely safe to eat.
If an egg cracks midway through boiling, you usually do not have to throw it away. The moment the egg white meets the hot water, it begins to cook, and the cracked spot seals itself. Even if a little of the white escapes, it cooks almost instantly and can be peeled away easily afterwards.
Why eggs crack in the first place
The biggest reason behind a cracked egg is a sudden change in temperature. When a cold egg taken straight from the fridge goes directly into boiling water, the shell expands rapidly and the pressure causes it to crack. Eggs also break when several of them knock against each other inside the pot. Sometimes tiny existing cracks or weak spots on the shell simply give way the moment they hit the heat.
Simple ways to stop the cracking
A little care goes a long way. First, take the eggs out of the fridge about 15 to 20 minutes before boiling so they come down to room temperature. Second, place the eggs in the pot first, pour cold water over them, and heat them slowly. This way the shell is never hit with sudden pressure.
If you prefer to bring the water to a boil first, do not drop the eggs in by hand. Lower them gently one by one using a spoon. Adding a little salt or a few drops of vinegar to the water also helps, because if a thin crack does form, the white sets quickly instead of spreading out.
Mind the pot and the flame
One more thing, never overcrowd the pot. Give the eggs enough room so they do not bump into one another. Once the water comes to a boil, lower the flame a bit and let the eggs cook on a gentle simmer rather than a rolling boil. And if an egg still cracks while boiling, resist the urge to fish it out midway. Let it cook all the way through, and you can simply remove the extra cooked white while peeling. With the right temperature and a touch of care, you can turn out beautifully boiled eggs every time.
