How long does mayonnaise last once opened

Mayonnaise is a thick creamy mixture that is used as a sauce in sandwiches, burgers, or with fries. Egg yolks are beaten with oil/butter and vinegar to make it. Due to the presence of egg yolks, it has the tendency to go bad if not stored properly.

The ingredients and preparation method also affect its life. You all must have it in your fridge or kitchen counter. No one wants to waste the money and whole mayonnaise jar which is used only once.

Are you one of them who are looking for how long mayonnaise lasts, storage method, and factors that affect its quality? Then you are at the right place. Let’s discuss all these aspects in detail so that you will utilize it in the best ways.

Which factors make mayonnaise go bad?

You must have seen the expiry tag on its jar. That tag indicates that after particular date mayonnaise is not worthy to use.

The ingredients that are used in the making of it are responsible for its spoilage. Egg yolk is the main ingredient, go bad even if you store mayonnaise in the fridge.

While the rest of the ingredients like vinegar and oil has some tendency to stay fresh longer.

When you open up the jar, the first thing that destroys its taste and texture is egg yolks. Due to which the rest of the condiment also wastes. This usually occurs after 2 months of leaving an open jar.

The freshness of ingredients while making mayonnaise also defines its life. More fresh egg yolks, butter, and vinegar you used the longer it will stay fresh.

And you can easily exceed your mayonnaise jar usage from 2 to 3 months. Store your opened jar of it in a cold place with no moisture. However, it is not compulsory for storing unopened jar of mayonnaise.

How to recognize if mayonnaise has gone bad?

Do you have an opened jar of mayonnaise in the fridge which is not used for a long time? Then it’s time to recognize if it has gone bad or not. Here we bring some tricks that will help out you to examine its freshness.

The appearance of mold: Look into it carefully. If you find the signs of mold or spores around the jar neck then discard the whole condiment.

Discoloration: If you find that it has changed its original color and turned brown yellow or darker then don’t consume it.

Smell the condiment: Open the jar and examine the smell. If you notice any acidic or strange smell coming out of the jar then it is not worthy to consume.

Check the taste: Check the taste of it with your finger. Once you notice the alteration in tastes then don’t consume it. A fresh or good mayonnaise has a sweet taste and creamy texture.

Go by your guts: You will easily recognize that it has gone bad just by your instincts. You will not go through the above steps to examine its freshness if you are using it for a long time.

How can you store mayonnaise?


Proper storage method is the first thing to avoid it from going bad. You have to ensure some of the measures to store it properly.

Whether you have opened the jar or not, store it in a dry and cold place as mentioned earlier. The temperature at which you store it matters a lot.

Bacteria grow rapidly at higher temperatures. If the room temperature is below 40 degrees Fahrenheit then it is safe to place it at room temperature.

But make sure that the jar is tightly closed and away from water. An opened jar of mayonnaise at room temperature in between 40- 140 degrees Fahrenheit for more than 8 hours is not worth eating.

Like ketchup and other sauces, a mayonnaise jar can have its place in a cabinet. The kitchen cabinet away from water, moist and heat is perfect for storing sealed in jars.

It lasts longer when place in the fridge. So placing a mayonnaise jar in the fridge is recommended to avoid any spoilage. But here a question emerges how long mayonnaise lasts with proper storage.


How long does mayonnaise last?

A best before the tag on jar tells you the time period in which mayonnaise has its best qualities. It doesn’t mean it goes bad after that period and you can’t utilize it. You can still use it for 3 months after that period if ensures proper storage.

It is prepared by using preservatives and pasteurized eggs on a commercial level. Separation of condiments from oil after a certain time doesn’t mean it has gone bad.

It just needs some stirring. After stirring you to find your mayonnaise with the same smooth texture as it was before. This is only in the case if you have stored it in the fridge.

Storage of it at room temperature doesn’t last long due to environmental factors. The time in which it stays good totally depends upon the storage method you adopt.

How long does homemade mayonnaise last?

Homemade mayonnaise keeps for a shorter time because it is made with raw eggs under normal conditions. Homemade mayonnaise will last less time. It is important to properly control the temperature and blending limit of mayonnaise while you make it.

This is why homemade mayonnaise can only last for one week, even when properly packed. If you want your mayonnaise to last longer, it is best to use commercial mayonnaise.

 How long does mayo last unrefrigerated?

The open jar of mayonnaise out of the fridge at room temperature lasts only for 8 hours. The room temperature above 40 degrees Fahrenheit doesn’t keep it good for more than 8 hours.

If you want to place your mayo out of the fridge then place it at a dry place with proper coverage. So that it doesn’t go bad too early.

What happens if you eat expired mayo?

You can go through a hard struggle if you eat expired mayo. Your stomach gets aches and pains because eggs and vinegar made the worst combination of acidity when expire.

You can also have typhoid fever due to salmonella bacteria caused by unhygienic eggs.

How can you use expired mayonnaise?

No one likes to discard the whole jar of mayonnaise after the expiry date which is used only once. You should look up some life hacks that will help you to make the best use of it.

Use old mayonnaise to shine up stainless steel appliances. The oil content in it will sparkle the dull steel surface. You can also use it in hair and exfoliating face mask.

What can I use instead of mayonnaise?

Your mayonnaise goes bad and you examine it at the last minute while preparing some snacks. Then you can use Greek yogurt, honey mustard, butter, or leftover dips in your snacking at the last moment.


I hope this article gives you enough information about how long does mayonnaise last. The lasting of it depends upon two things majorly. One is the freshness of ingredients that are used second the method you adopt to store it. We also discuss some of the other facts that how can you make the best use of mayo when expired and alternatives that can be used in place of mayonnaise. If you have any questions comment below. We are looking forward to answering your queries.


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About the author

Natalie is a food enthusiast who spends all of her time trying out new recipes, testing out new appliances, and making her kitchen as awesome as possible. She is a professional writer and blogs here about her love of food & kitchen.

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