I have some eggs that I was about to use and noticed that they expired on January 11th. Are they still ok or should I run out to get some new ones?
Look for the 3-digit Julian number on the box. which is the day of the year they were packed. E.g., 027 is today. Eggs are good for 4-6 weeks beyond the Julian date. If they are bad, you'll know it by smell. With old eggs, if you are using a bunch it is wise to crack into one bowl, sniff, then ad it to the other cracked eggs in a larger bowl.
Crack each egg separately into a glass. If the yolk holds together and it doesn't smell bad, you're fine. If the yolk busts, throw the egg away. Do this for each egg. If one is bad, it doesn't necessarily mean they all are.
eggs easily keep up to a month after the "expiration" date which in reality is a "sell by" date on the package?
The only way is to do the sniff test, as mentioned above.
The "egg floating in water" test is just an indicator of age, not an indicator of badness or spoilage.
I have always used the float test - with successful results. The "scientific" explanation is:
Firstly, fill a fairly deep bowl with water and carefully lower the egg into the water.
A very fresh egg will immediately sink to the bottom and lie flat on its side. This is because the air cell within the egg is very small. The egg should also feel quite heavy.
As the egg starts to lose its freshness and more air enters the egg, it will begin to float and stand upright. The smaller end will lie on the bottom of the bowl, whilst the broader end will point towards the surface. The egg will still be good enough to consume, however, if the egg fully floats in the water and does not touch the bottom of the bowl at all, it should be discarded, as it will most likely be bad.
A bad egg will also feel extremely light in weight and give off a pungent smell.
The second method to test the eggs freshness is by breaking the egg onto a flat plate, not into a bowl.
The yolk of a very fresh egg will have a round and compact appearance and it will sit positioned quite high up in the middle of the egg. The white that surrounds it will be thick and stays close to the yolk.
A cloudy colouring to the egg white is a sign of extra freshness, as this "cloudiness" is in fact carbon dioxide, which is present when the egg is laid. Over time, the egg white will become more transparent, as the carbon dioxide dissipates.
A less fresh egg will contain a flatter yolk, that may break easily and a thinner white that spreads quite far over the plate.
I have used eggs several weeks past their expiry date, always checking them in water first.
Search the General Topics board for tons of info on this.
As most have said so far, they are good at least a month affter Eggs will keep a long time, sometimes up to six months.