So there’s a seasoned of mei sitting in your fridge for a couple of months already. Friend were about to usage it however noticed the it’s previous the date on the label. That brings the question: does mayonnaise go bad?

Many civilization think that mei is very comparable in regards to storage and also shelf life to ketchup or mustard. There space similarities, but since mayo contains eggs, there space some far-reaching differences too.

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In this article, we go with storage, shelf life, and also going bad of mayo. If you’d prefer to learn a bit much more about this condiment, check out on.

(credit: Sara Cervera)

How To store Mayonnaise

For one unopened seasoned of mayo, storage guidelines room pretty lot the same as because that mustard. That way you have to keep it at cold temperature, in a dry place away from resources of heat. A cabinet in the kitchen that’s away from the cooktop is a well-known choice, but the pantry works well too.

Unopened mei doesn’t require refrigeration (unless the label says otherwise), however of course, maintaining it in the fridge won’t pains either.

Once you open the jar, store it strict sealed in the fridge once not in use. Unequal ketchup or BBQ sauce, open mayo shouldn’t it is in stored in ~ room temperature. Same thing with any sandwiches or dishes through mayo.

Mayo in potato salad
Last however not least, let’s speak a bit around food hygiene.

You should always scoop mayo with clean utensils used only for that mayo. If you’re utilizing the same ones you use for various other foods, you’re risking cross-contamination.

“Double-dipping” might transfer part harmful bacteria into your mayo, and also that might reason it to go bad much sooner than you’d like.


If her mayonnaise comes in a to express bottle, make sure you clean it through a dry record towel, not a wet one.

Salad dressed with mayo

How lengthy Does Mayonnaise Last

Pretty much all jars of mei come with a best-by date. That date is an estimate for exactly how long the product will certainly retain its freshness. That means the product will probably last longer.

How long specifically will it last past the best-by date? Unfortunately, it’s impossible to tell. It’s even complicated to offer a turbulent estimate in ~ this point.

That’s due to the fact that there are hundreds of mayos produced by assorted companies and each one with its own distinctive ingredients list.

Mayo in tuna salad
Some that them, like Hellmann’s real Mayo, usage mostly basic ingredients, favor oil, eggs, vinegar, and some condiments. Others include a bunch of preventive to the mix, which provides the mei last months or also years in the fridge, but isn’t very beneficial come one’s health.

To simplify, we can assume the the mayo have to be okay for up to 2 to 3 months after the ideal by date.

(credit: Diego Marín)
When it comes to homemade mayo, it should last around a week in the fridge.

If girlfriend wonder why her homemade mei doesn’t last as long as a store-bought one through the very same ingredients, the answer is simple. The mei you do on your very own is most most likely made utilizing raw eggs. Commercial mayonnaise provides pasteurized eggs, which are both safer (in regards to food safety) and also last longer.

Mayonnaise (unopened)Best through + 3 – 4 months
Mayonnaise (opened)Best by + 2 months
Mayonnaise (homemade)1 week

Please keep in mind that the periods above are estimates and for best quality only.

How to Tell If Mayonnaise Is Bad

There room at least a few symptoms the your mayo has gone bad. Below they are:

Any organic growths inside the jar, choose mold or spores.Off, acidic, or putrid smell.Noticeable change of color, like darker shade of white or brownish-yellow.Off taste.

If you an alert any that the symptoms above, discard the mayo. very same thing if you’re storing it because that a really long time, even if it appears perfectly fine. Much better safe 보다 sorry.

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Marcin is the guy behind After ~ writing more than 300 write-ups on food storage, shelf life, and spoilage, he"s learned a thing or 2 on the topic.