How Can You Tell if a Hard Boiled Egg is Bad?

Hardboiled eggs can last up to a week in the fridge. Be sure to label and date the eggs. They are likely spoiled if they are older and should be tossed. If the yolk is gray or watery, the egg is probably wrong. If the shell is slimy, it’s contaminated with bacteria or mold. A brown shell is a sign of spoiled eggs. To know how can you tell if a hard boiled egg is bad, read further.

boiled eggs

A hardboiled egg’s color is a good indicator of how fresh it is. A pale, greenish-blue yolk means that the egg has been overcooked. A longer cooking time will cause the yolk to mix with hydrogen sulfide in the white part, resulting in a gassy smell. A ring of gray or greenish-green is an indication of rotten eggs.

Boiled Egg Nutrition Fact

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Some Points That Indicate A Hard Boiled Egg Is Bad

Smell And Taste

One of the best indicators of spoiled eggs is the smell. A rotten egg will smell of sulfur, and if the smell is too strong, throw it out. Alternatively, a rotten egg may have a foul odor but is perfectly edible—a few simple steps. You can check if the yolk is slimy or moldy by smelling it before cracking it open.

The float test is the easiest way to determine if a hardboiled egg is rotten. The egg is likely spoiled if the spongy yolk is brown or the slimy shell is red. In addition to its appearance, the smell of a rotten egg is a definite indicator of badness, and if it smells terrible, it is most likely spoiled.

Egg Yolk

A spoiled hardboiled egg will have a greenish ring around the yolk, and this is a sign that the egg is not thoroughly cooked and should be refrigerated. If the yolk is green, it’s spoiled, which may be due to bacteria or mold in the yolk. You should keep the boiled eggs in the refrigerator and store them carefully to avoid this.

The yolk is the essential part of a hardboiled egg. While it can last a week in the refrigerator, its lifespan outside the refrigerator is much shorter. Once boiled, bacteria can grow and make it dangerous for consumption. Always store hardboiled eggs in the refrigerator for safety purposes. And remember: if you’re unsure, crack open the egg and smell it to determine if it’s spoiled.


The color of a hardboiled egg can be changed by cooking it longer. If overcooked, it will turn green, turning the yolk yellow. This is a sign that the egg is not cooked correctly. When the yolk turns green, it means it’s been overcooked and that the yolk is not cooled. This is a sign that the egg has gone wrong. It’s still safe to eat, but it’s a sign that it’s too old.

The color of a hardboiled egg can be easily determined by its smell. If the yolk is pale or grey, it’s spoiled. The yolk contains hydrogen sulfide and iron, which may cause stomach ailments. The browner the yolk, the more likely it is to turn black. Regardless of its color, a hardboiled egg is still edible for up to a week if stored properly.

How To Store Boiling Eggs Correctly?

The shell’s protective coating is destroyed during boiling, leaving the eggs vulnerable to air and hazardous germs.

To keep hardboiled eggs from being contaminated or deteriorating, they must be refrigerated.

Storing them in the refrigerator helps inhibit bacterial growth since bacteria that are possibly harmful grow slower at temperatures below 40°F (4°C).

Cooked eggs should not be left out at room temperature for long periods and should be refrigerated within 2 hours of cooking.

It’s also a good idea to keep them in their original carton or an airtight container. Keep them on an interior shelf rather than in the door, as the temperature in this area may fluctuate due to frequent opening and closing of the fridge.

When storing hardboiled eggs in the refrigerator, you may notice a gassy stench at first. This is due to hydrogen sulfide, produced when eggs are boiled.

This is typical and harmless, and the odor typically goes away after a few hours.

Finally, freezing hardboiled eggs is not suggested since the egg white and yolk become harsh and watery, making them less delightful to consume.

When It Comes To Hard Boiled Eggs, How Long Do They Last Before They Go Wrong?

Hardboiled eggs, peeled or unpeeled, can be securely stored in the refrigerator for about a week if handled properly, according to the United States Department of Agriculture.

If you’re not sure how long your hardboiled eggs have been stored, look for a slimy or chalky appearance on the shell. To be safe, toss out the egg if it is present.

It’s crucial not to eat eggs that are past their best, as this puts you in danger of foodborne illness, which can cause diarrhea, nausea, and vomiting.

The odor of a rotten hardboiled egg is unique and unpleasant. If the egg’s shell is still attached, you’ll have to crack it to examine the smell.

When the yolk of a hardboiled egg turns greenish-gray, many people become concerned. This does not, however, imply that your egg has gone wrong.

The color of the yolk varies based on the amount of time it is cooked and the temperature it is cooked at. When eggs are boiled for an extended period, the yolk grows lighter and eventually becomes a greenish-gray tint.

When you overcook an egg, the iron in the yolk reacts with the hydrogen sulfide in the white, resulting in this color.

While the texture and mouthfeel may be affected, it is safe to eat.

Is It Possible To Freeze Hard Boiled Eggs?

While it is technically possible to freeze hardboiled eggs, it is not recommended for preserving whole eggs. The texture of the egg whites will alter during the freezing process, and they may become rubbery.

If you wish to freeze hardboiled eggs for an egg salad or any meal that calls for chopped eggs, do so separately from the other ingredients. When the eggs are thawed, mayonnaise, spices, and other ingredients can be added.

Chop or grate the eggs and place them in a firmly sealed container or freezer bag to freeze. Hardboiled eggs should only be frozen for a month or two, so make sure to mark the date on the exterior of the container.

Hardboiled eggs should be thawed overnight in the container and used within two days.


You can determine the freshness of a hardboiled egg by the float test. Put the boiled egg in water that’s two to three inches deep. If the yolk floats, it’s probably not fresh. Nonetheless, if the wing is dipped in water, it’s a sign that the egg is overcooked. If it doesn’t float, it’s probably rotten.

Unlike raw eggs, boiled eggs will go bad much sooner than raw ones. The water removes the waxy covering that protects raw eggs from bacteria, and this coating prevents the bacteria from getting into the egg. If the steamed egg is contaminated, you should discard it. Once the egg is spoiled, you should throw it away. If it has gone wrong, it will not taste good.