Almost everyone who has cooked boiled eggs has also overcooked boiled eggs. When hard boiling eggs, it’s very easy to fall into the trap of “there’s no such thing as too long” because it doesn’t seem to matter. As long as you boil them enough so that the yolks are hard, who cares how long you cook them for?
You might notice, however, that the yolks take on a funny green or gray tinge when you overcook your eggs. The inside may still be yellow, but the outside doesn’t look so good anymore, and that might lead you to question whether it’s safe to eat overcooked boiled eggs.
Can you eat overcooked boiled eggs? Yes, it is safe to eat overcooked boiled eggs, even if you have considerably overcooked them. Regardless of any green tint around the yolk, as long as the egg was fresh when it was cooked, it should be fine to eat once you have finished cooking it. Don’t worry about overcooking your eggs.
Are Overcooked Boiled Eggs Always Safe?
Yes, overcooked boiled eggs should always be safe, provided they were cooked using fresh eggs. There are no harmful chemicals or reactions going on.
You may have read things about the sulfur content in eggs making them dangerous by releasing hydrogen sulfide, but the amount of sulfur in eggs is safe for humans, even when they have been overcooked. Even if they release some gas into the egg, it’s in minuscule amounts, and will not hurt you.
Unless you are allergic to eggs, you should find boiled eggs completely safe to eat. There are no records of anyone being made ill by an overcooked boiled egg.
What Makes the Green Layer on a Boiled Egg Yolk?
As mentioned, you may sometimes observe a green layer on the outside of the egg’s yolk when you cut up a boiled egg. This green layer is completely harmless. It is a result of iron and sulfur within the egg reacting with the yolk’s surface and it will not hurt you at all.
You might occasionally observe this ring around your egg’s yolk even if you haven’t overcooked the yolk. That’s usually a sign that there’s a lot of iron in the water you’ve boiled the egg in.
Again, it’s nothing to worry about and it won’t hurt you at all. You can just ignore it and enjoy your egg as you would if it had a bright yellow yolk.
How Long Should You Cook an Egg to Hard Boil It?
A boiled egg should usually be cooked for nine minutes, or up to twelve minutes if you prefer a really firm center. Longer periods of time will often be considered overcooking and while that isn’t a problem for your health, there are disadvantages that we’ll come to shortly.
There are many different methods for boiling eggs, but a lot of people prefer to start by putting their eggs in cold water. This should then be placed on a high heat to bring it to the boil.
Many people then turn off the heat and cover the pan with a lid. Set a timer at this point. Four minutes will leave the center somewhat soft but still thick, and at twelve minutes, the centers will be fully cooked.
If you prefer a more liquid yolk, take them out a little sooner. Of course, how quickly the egg cooks will depend to some degree on its size, so take this into account when timing. A very large egg will need a little longer to cook than a noticeably small one.
Once the eggs have had their allotted time, you can remove them and plunge them into cold water. This prevents them from cooking further. If you leave them on the side, the heat trapped within the egg will continue to cook it, and could result in overcooking.
If you leave them in the hot water, this is even more likely to happen. You should aim to remove eggs from the heat promptly to reduce the chance of ruining them by cooking them too much.
Most methods recommend rinsing them in cold water and then repeating the process, cooling the eggs down as quickly as possible. You don’t have to do this, but you may find that your eggs are better cooked as a result.
Are there Disadvantages to Overcooking a Boiled Egg?
If there are no health problems associated with overcooking a boiled egg, why does it matter if you overcook them? Unfortunately, overcooking a boiled egg negatively affects both its taste and its texture and makes it a much less enjoyable meal.
An overcooked boiled egg is often rubbery, depending on how overcooked it is. If you have just left it on for an extra minute or two, don’t panic – it will be fine. If, however, you forgot your eggs for a few hours and only discovered them much later, you may find that the whites have lost their softness.
Biting into an overcooked boiled egg can be an unpleasantly “bouncy” experience and you might find yourself struggling with the texture of the white. Equally, the yolk can be ruined. It tends to turn chalky when it is overcooked, and can be very dry and unappealing, whether or not it has a green surface.
The taste of an overcooked egg is also off-putting. Many people find that the sulfur is much more noticeable in an overcooked egg, and this can make for an unpleasant experience. If you are going to try eating a forgotten hard boiled egg, you may need to disguise its flavor a bit with sauce or seasoning.
Some people also find that an overcooked egg is harder to digest. This may be because cooking denatures the proteins and makes them harder in texture – which, in turn, makes it more difficult for your body to break them down.
Overcooked eggs are not dangerous from a health perspective, but they are less appetizing than eggs that have been boiled for the correct amount of time. They may deteriorate in terms of taste and texture, and some people find them harder to digest. Where possible, use a reliable timer and avoid overcooking your eggs.