How do you know if mayonnaise is expired?

In this article, we answered the following question:  How do you know if mayonnaise is expired? We talk about the shelf life of homemade and industrial mayonnaise and will let you know the best trick to keep mayonnaise fresh for longer.

How do you know if mayonnaise is expired?

You will know that the mayonnaise is expired because it will change its taste because it will become very sour. Expired mayonnaise can also be detected by smell since bad mayonnaise will emit a strong odor. Visually, too, mayonnaise that is unfit for consumption can be identified. 

When the surface of the mayo is much darker than the mayonnaise at the bottom of the container. This is the effect of oxidation. If you notice uneven colors on your mayonnaise, refrain from eating it! Lumps can also appear on expired mayonnaise.

Like ketchup, expired mayonnaise is also noticed by a whitish or brownish mold that forms on the lid of the jar or on the surface of the mayonnaise. Expired mayonnaise can also loosen and oil can appear on the surface. Do not eat mayonnaise when these signs are visible.

The shelf life of mayonnaise

Do you have an irresistible craving for mayonnaise to accompany your fries? Wondering if the jar of mayonnaise in your fridge is good? If it is an industrial mayonnaise, bought at the supermarket, then it can be consumed up to 10 weeks, or about 2 months after opening the jar. Provided it is stored properly in the refrigerator and not past the expiration date.

On the other hand, for homemade mayonnaise, it is not recommended to eat it after a week (7 days of storage in the fridge). And yes, industrial mayonnaise is embellished with preservatives to optimize shelf life.

Whether to accompany a starter or to dip your fries, there’s nothing like mayonnaise!

Storage time of a homemade mayonnaise

Twenty-four hours for some, a week for others … From one house to another, practices differ. FDA asks consumers to limit the shelf life of homemade mayonnaise to 24 hours after it has been made. The latter should then be stored in an airtight container in a cool place at a temperature of 4 ° C or less. In the Guide to good hygiene practices for caterers and restaurateurs, the same observation is made.

Storage time of an industrial mayonnaise

Purchased in supermarkets, in tubes or jars, artificial mayonnaise can be consumed up to 10 weeks after opening the jar. A little tip: write down the date you opened your jar on the label.

The best trick to keeping mayonnaise fresh longer

Isn’t twenty-four hours of storage enough? It is possible to extend the shelf life of homemade mayonnaise. Add lemon or vinegar to your preparation and keep your mayonnaise cool for one more day.

Does mayonnaise expire?

Homemade mayonnaise contains almost no preservatives, so their shelf life once made is quite short and it is not recommended to consume it after more than 48 hours, so it is better than if you are used to making it at home, do not a lot of sauce or you will have to throw it away.

Mayonnaise bought in the supermarket is the one that most people will have at home, and which has a much longer useful life than the homemade one, and much longer than that indicated on the bottle as the expiration date. 

When does mayonnaise expire? 

An open jar of mayonnaise will last good in the refrigerator for up to two months. If the jar hasn’t been opened yet, it can last up to a year in the refrigerator, or 2 to 3 months out of the fridge.

As you can see, these products do expire, but not as soon as indicated on the jars where it says that they must be consumed within 72 hours once opened, which would practically condemn us if we were to pay attention, not only to throw away the entire jars after a simple use but also to buy a bottle of each, every time we want to use them, which is obviously a nonsense outrage.

How long is unopened mayonnaise good for after expiration date?

Unopened mayonnaise can be good up to a year after the expiration date if it is kept in the refrigerator, or 2 to 3 months out of the fridge. After this interval, its color and aroma may be affected.

Mayonnaise is very popular because it is a sauce widely used as such in many dishes, but above all, because it is the base sauce on which another multitude of very famous sauces are made such as tartar sauce that is served in dishes as famous as fish and chips or pink sauce that is widely used in prawn cocktails, indeed, the pink sauce is also known as a cocktail sauce.

Mayonnaise occupies an important place in the refrigerators and shelves of all houses and restaurants in much of the world, mainly in the West, although these tend to be open for a long time in our refrigerators.


In this article, we answered the following question:  How do you know if mayonnaise is expired? We talked about the shelf life of homemade and industrial mayonnaise, and let you know the best trick to keep mayonnaise fresh for longer.

From what you already know, if no more time has passed than indicated above in this article and it also has both visually and its smell is still fine, you can consume it without problems, I hope this article has helped you, any questions or opinions please let us know!


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.

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