How Long Does Mayonnaise Last in the Fridge?

How long mayonnaise keeps in the refrigerator depends on the brand you choose and whether you use it right away or not. For instance, Hellman’s mayo has a Best by and expiration date. It can last up to six months if you purchase it before the Best By date. Divide it up into different jars to lengthen the shelf life. The jar might not be hazardous if it is empty.


It is crucial to store mayonnaise in the refrigerator after it has been prepared or after a jar has been opened because most mayonnaise is manufactured with eggs or an egg substitute. It is advised to use homemade mayonnaise within one to two weeks and store-bought mayonnaise within two months of opening to ensure the optimum flavor. The use-by date on the bottle is always a reliable reference, as Hellmann notes.

How Long does Mayonnaise Last in the Fridge?

Before it loses its nutritional value, mayonnaise can be kept in an unopened jar for up to a year. Once opened, mayo can be kept in the refrigerator for two to three months but just a few hours when left out. This is because egg yolks, one of the ingredients, deteriorate quickly when exposed to air and heated temperatures.

It’s wise to be alert to the various warning signals that indicate food has begun to spoil. In most US households, mayonnaise is a staple. While some people might swiftly finish the nation’s favorite creamy sauce, others could have a jar sitting in the back of the fridge and wonder if it’s still edible.

How to Store Mayonnaise?

Storage instructions for a jar of mayo that has not been opened are very similar to mustard. That indicates that you should keep it cold and dry, away from heat sources. The pantry also works well, but a kitchen cabinet away from the oven is a common option.

Although keeping mayo in the refrigerator won’t harm it, it is unnecessary to refrigerate unopened mayo (unless the label specifies otherwise).

When not in use, put the opened jar in the refrigerator with a tight lid. Open mayo shouldn’t be kept at room temperature in contrast to BBQ sauce or ketchup (find out how long ketchup lasts here). The same goes for any sandwiches or meals that use mayonnaise.

  • Let’s discuss a little about food hygiene before we wrap up.
  • Always use clean, specially designed tools to scoop mayo. You risk cross-contamination if you use the same ones for other foods.
  • If you “double-dip,” you might introduce some hazardous germs into your mayo, making it spoil faster than you’d like.

How Long does Mayonnaise Last?

Egg yolks, oil, vinegar, or lemon juice are the ingredients of mayonnaise. Check the jar label to see how long your mayonnaise will last! Except for the eggs, the remaining components can be stored without going bad for over a year.

But remember that the “best by” and “expiration” dates of mayonnaise are two very different things. The term “best by” designates the final day that the product will be at its finest. This indicates that even beyond that date, you can still consume it.

Mayo will remain fresh for two to three months after the expiration date since it contains ingredients and preservatives that persist for so long, especially when it is unopened. You only need to mix the oil to recombine it if, by this point, you detect that it is beginning to separate.

However, it’s unclear how long it will be edible after the “best by” date. This is based on the caliber of the components used to make the mayo. For instance, mayonnaise with little preservatives won’t keep as long as one that does.

The way you store the mayonnaise affects its freshness in addition to the date. For instance, a refrigerated jar of unsealed mayo will continue to be good for another two to three months after the “best by” date. However, if the mayo has been hanging out at room temperature for more than 8 hours without being exposed to bacteria, you should discard it.

You might now be wondering, what about homemade mayo? In the refrigerator, homemade mayo will remain fresh for a week. Expect it to last less time because you presumably used raw eggs (as opposed to commercial mayo, which uses pasteurized eggs).

Let’s discuss the misconception regarding dishes flavored with mayo last. You’ve likely read or heard somewhere that adding mayo can hasten the expiration of your sandwich or salad. Our purpose is to disprove such rumors.

You see, mayonnaise contains a lot of acids. It is extremely improbable that it will make other foods spoil because of these qualities that stop bacteria from forming in them!

But you know what will? The remaining ingredients you use to prepare your meals! Therefore, if you acquire food poisoning from your food, don’t blame mayonnaise. The most likely explanation is that you consumed food that had been sitting in warm weather for several hours.

Reference: Assessment of the Antioxidant Activity of Sage
(Salvia officinalis L.) Extracts on the Shelf Life of Mayonnaise

Can Mayonnaise be Frozen?

One of these foods you shouldn’t freeze is mayonnaise. You can freeze it if you create too much of it, although it is an uncommon practice. Low temperatures will change the texture and flavor without causing it to spoil.

These days, it’s possible to do that without significantly altering the texture of the food after thawing. Remember that you must move quickly. Select and sterilize a glass container that may be stored in the freezer. Put the jar in a pot with water, bring it to a boil, and then remove it.

Mayonnaise should be added to the glass jar, but always leave 1 inch (2.5 cm) of space since it expands when frozen. Seal the jar after getting rid of as much air as you can, then put it in the freezer.

Before thawing it, you should let mayonnaise defrost in the refrigerator as much as necessary. You can re-emulsify your mayo if the oil separates from the emulsion to bring it back to its original consistency. Use thawed mayonnaise no longer than five to six days.

How to Tell if Mayonnaise is Bad?

Your container of mayo may remain unopened in the refrigerator or cupboard for months if you’re one of those who don’t use it frequently. You realize how long you’ve had it when you finally require it, and you start to doubt your ability to continue eating it.

Here are some tips to ensure that mayo is fresh so that you can relax:

  • Could you take a look at it? It’s time to throw it out if you notice mold or spores, especially near the jar’s neck. It’s also not a good indicator if the yellow appear deeper or brownish.
  • Look for the odor. Say farewell if it creates an unpleasant, putrid, or acidic smell.
  • Last but not least, taste it. Don’t use it if the flavor is a touch-off. You wouldn’t want a salad or sandwich with an odd flavor.
  • Let’s finally talk a little bit about correct usage. Although mayo has a long shelf life, you shouldn’t take food safety for granted.
  • To begin with, always use a clean spoon designated solely for mayo to scoop up food. Use different utensils for different foods unless you wish to run the risk of cross-contamination.

How do You Make Mayonnaise?

There are many mayonnaise recipes, and every company and cook has their unique take on this time-honored condiment. But the main ingredients in mayonnaise are oil, raw egg yolk, lemon juice, and seasonings. It would help if you used a little mustard while creating homemade mayonnaise since it gives the dish taste and keeps the ingredients from separating.

The egg yolks should be added to a food processor first, then the seasonings and mustard. Once that is blended, add the oil very gradually. As an emulsion, mayonnaise is a mixture of liquids that do not blend. If you add the oil too quickly, the oil droplets won’t be able to spread evenly, and your mayonnaise will divide. Once prepared, store mayonnaise in the refrigerator under cover until used.

Is There a Vegan Version of Mayonnaise?

It is possible to manufacture vegan mayonnaise. There are several recipes, some of which are best created from scratch. What has been utilized in place of the egg has ultimately determined the variances. Tofu and aquafaba, created from chickpea juice, are both popular options. You can also use cashews if you don’t mind nuts. Nutritional yeast is frequently added to recipes to give the mayonnaise a “dairy” consistency. Lastly, a typical vegan mayonnaise employs soymilk as the base because mayonnaise is traditionally created in Spain using milk rather than eggs.

Can Mayonnaise be Applied to Cosmetic Procedures?

Not only is mayonnaise used frequently in cooking. In terms of beauty, it can also be said to be universal. Because of its oils, mayonnaise is a fantastic conditioner for dry skin and hair. It is a great substitute for after-sun lotion for the same reason. Apply some mayonnaise to the affected region to soothe the discomfort while conditioning the skin simultaneously.

Mayonnaise can be used to strengthen your fingernails and give you a quick facial by rubbing it on your face. However, the condiment has other benefits than moisturizing. So, if you ever find yourself in a bind, opening the jar of mayo in your refrigerator might be the solution.

What Happens if You Eat Expired Mayo?

If you only have a few mild stomach problems, your store-bought mayonnaise may be past its sell-by date. However, if your stomach hurts terribly, visit a doctor. Due to the unpasteurized egg yolk, there is a significant danger of food illness if the mayonnaise is handmade. After a week, it may become a salmonella breeding environment. Therefore, you should throw it away.

There are still some uses for that jar of used-up mayonnaise, so don’t throw it out. Your stainless steel appliances and silverware will once again gleam if you dab a little bit of it onto a dry cloth and rub. Enjoy quiet door and window opening and closing by placing some of it between noisy hinges in your home.


One of the most crucial things to remember is to carefully inspect the jar of mayonnaise before storing it to look for any mold or alien growth symptoms. Throw it away if you see a darker color. This is a sign that the mayonnaise is beginning to spoil. Throw away the mayonnaise if you discover it to be odorous.