Does Mustard Go Bad? What You Need to Know About Mustard

You can think about mustard-like ketchup or mayonnaise. You can store them at room temperature and also in the refrigerator. However, the refrigerator will certainly give it a longer life.

Does Mustard Go Bad

Mustard is used in making sandwiches, burgers, and hotdogs and can be used with many other types of fast foods as well. Such ingredients are sometimes also used after their best before the date expires.

While it sounds risky, but mustard can be used for few months after its expiry if it is properly kept and maintained. That means that, besides this best before date, many other factors can increase or decrease the life of your mustard. The best way to check how long your mustard will last is to check the best before the date provided by the company on the Jar. Rest is up to your use.


Storing mustard is simple. You just have to keep it away from temperature and sunlight. You can keep it at room temperature. It is suggested to keep a small bottle at room temperature which you are certain you will use in a couple of months.

However, if you have a larger packet, box, or bottle which you plan to use for the whole year, better to keep it in the refrigerator. Keep a smaller bottle at home for regular use which you can consume in 2-3 months.

One other thing which you have to keep in mind is to store mustard in dry places with its lid airtight closed. The reason for this is to stop mustards contact with air which might cause it to lose its quality.

Keep Your Utensils Clean

Once you have opened the Jar, the mustard comes in contact with air, and from there on forward it must be maintained to make it last till its expiry or even after that.

The best way to do that is to keep your spoons and knives, which you use to take mustard out of the jar, completely hygienic. If they get any impurities into the mustard, it can cause the mustard to go bad.

The main reason behind this is the risk of bacterial mold. If a bacteria gets into mustard and starts developing, it won’t just reduce your mustard’s life. The mustard will be entirely wasted because of bad taste and smell.

Mustard Quality over Time

Mustard comes in different qualities and brands. The expensive and good ones last longer than the cheaper ones. The expensive ones have acidic contents in them which make them last even past their due dates.

However, mustard is not immortal and loses its texture and quality over time. It doesn’t always remain as shiny and tasty as it was new and degrades over time and finally, a time comes when it remains no longer useable.

Some Tricks to Keep Your Mustard Fresh

Once you have opened the jar’s airtight seal, it will take some maintenance to keep the mustard look and taste good. One of the first and foremost steps is to keep the jar airtight locked at all times when not in use.

If you don’t keep the jar airtight locked, the mustard will dry out. However, dried mustard doesn’t mean it has expired or it can no longer be used. You just require a simple trick to get it started again.

This simple trick involves vinegar. So, if your mustard wasn’t kept in an airtight container and dried out, you can add one or two tablespoons of vinegar and stir it and you have your quality mustard back.

Another trick is to keep it refrigerated. The refrigerator provides a much more secure and stable environment to the mustard than your kitchen shelf. The mustard will last longer if it is kept there.

However, the mustard tends to separate when kept for a longer time at the same place. Again, this doesn’t mean it has expired or gone bad. You can simply stir it and it is all good for use again. Honestly, mustard is a tough companion to lose.

The mustard kept at room temperature will last for 2-3 months max, but the one stored in the refrigerator can last more than a year. Surely sense rings to the eardrums.

How to Tell If Mustard Has Gone Bad

Mustard doesn’t expire easily and exceeded everyone’s expectations, even after the expiry date of the company. But, it can go bad if the above-mentioned conditions aren’t followed properly.

Hence, you should look inside the jar at least once a day to check for molds or smells. If you find a mold, that means bacteria have contaminated your mustard because it wasn’t properly stored.

Moreover, if there is a pungent odor that you can feel from mustard that also means mustard has gone bad. In both such scenarios get rid of it. Mustard does lose quality, taste, and texture over time, hence you eventually gonna need a new one.

Frequently Asked Questions

How long does mustard last in a fridge

  1. How long does mustard last in a fridge?

Well, theoretically it should last about a year if you keep it properly refrigerated. However, other factors also contribute here. You have to use clean utensils with it and also you have to keep the container airtight locked.

  1. How can you tell if mustard has gone bad?

It is easy to tell if mustard has gone bad. You can see a mold in the jar in case of bacterial contamination, or you will be able to smell it. Besides this, there are not many indications or possibilities, except the date of expiry.

  1. Is dried mustard useable?

If your mustard has dried up it doesn’t mean it has expired. Dry mustard means that you haven’t closed the container properly which caused it to dry out. You can resolve this remedy by simply adding one or two tablespoons of vinegar and stirring.

Some Last Words

We have tried to cover all the aspects of “Does Mustard Go Bad” in this article. We hope it will help resolve your query.

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About Carissa Taylor

Carissa is the founder and creator of the Gliving. With an emphasis on healthy eating and living, Carissa's recipes and food photography have been featured in various publications including the Food Network Blog, Huffington Post, TODAY Food, and more.