Do not routinely buy or keep an egg that was already cracked because a shell crack can let bacteria enter from the outside. The shell and membranes are important contamination barriers.
Not every crack happens under the same circumstances, however. An egg that breaks in your kitchen moments ago is different from one that may have been cracked for hours in a carton.
Do not buy eggs that are already cracked
USDA recommends choosing clean eggs with intact shells. With a crack present before purchase, you do not know when it happened or how the egg was handled afterward.
The shell surface can carry environmental microorganisms, and an opening gives them an easier route inside.
The uncertainty is the main reason to discard rather than gamble on a pre-cracked egg.
If an egg cracks accidentally at home, act immediately
USDA guidance allows an egg that accidentally cracks at home to be broken completely into a clean container.
Cover it, refrigerate it promptly, and use it within about two days.
This advice assumes you know the egg was intact and properly refrigerated immediately before the accident.
Do not store raw egg inside a broken shell
Once the shell is compromised, leaving the contents partly exposed inside it is not reliable protection.
Moving the egg to a clean covered container limits exposure and lets you store it properly.
Label the container if you are not using it immediately so the short storage window is obvious.
An egg that cracks during boiling is different
USDA specifically says eggs that crack during hard cooking are safe.
In that situation, the egg is receiving heat while the crack occurs rather than sitting raw for an unknown period.
Some white may leak into the cooking water, but that is mainly a quality problem.
Hairline cracks still count
Some cracks are difficult to see. A shell may have a fine line without obviously splitting apart.
Commercial grading systems treat cracked eggs as restricted rather than ordinary consumer-grade shell eggs.
If you discover a hairline crack at home but cannot tell when it happened, discarding the egg is the safer choice.
Washing does not repair a crack
Rinsing a cracked shell does not restore its barrier and can move moisture and contamination around the damaged area.
Household tape, plastic wrap, or wax does not make the shell safe again either.
The decision depends on when the crack occurred and how the egg was handled.
How should an accidentally cracked egg be cooked?
For maximum safety, use it in a fully cooked preparation such as firm scrambled eggs, a cooked omelet, cake, or another dish that receives adequate heat.
A stored cracked egg is not the best choice for homemade mayonnaise, tiramisu, raw batter, or runny-yolk preparations.
Pregnant people, older adults, and people with weakened immunity should be especially cautious with unpasteurized eggs.
What if several eggs break in the carton?
If you know exactly when it happened, such as dropping the carton after arriving home, separate the damaged eggs immediately so raw contents do not continue contaminating intact shells.
Clean the storage area and handle the spill like other raw egg contamination.
Temperature history matters as much as the crack itself. A freshly damaged refrigerated egg is a controlled event; an egg found cracked after sitting warm has an unknown contamination window and should not be treated the same way.
If raw egg leaks onto the carton or refrigerator shelf, clean the spill promptly with normal food-safe cleaning practices. Do not let intact shells remain coated with dried raw egg, since that creates additional contamination during later handling.
The practical rule: an unknown or pre-purchase crack means discard. A fresh accidental crack at home can be transferred to a clean container, refrigerated, and used promptly in a fully cooked dish. A crack that occurs during hard cooking is safe.
Frequently asked questions
Can you eat an egg that was already cracked when purchased?
It is not recommended. USDA advises against buying cracked eggs because bacteria can enter through the damaged shell.
What if an egg cracks at home?
If it just happened, transfer it to a clean covered container, refrigerate it, and use it within about 2 days in a fully cooked dish.
Is an egg safe if it cracks while boiling?
Yes. USDA says eggs that crack during hard cooking are safe to eat.
Sources
- USDA FSIS — Is it safe to use eggs that have cracks? — Indica no comprar huevos agrietados y confirma que los que se agrietan durante cocción son seguros.
- USDA FSIS — Shell Eggs from Farm to Table — Explica compra, refrigeración, cáscaras intactas y manejo general de huevos.
- USDA AMS — Shell Egg Surveillance — Define huevos agrietados como restringidos dentro del sistema de comercialización estadounidense.