Last Updated on December 31, 2022 by Shari Mason
Miso is a Japanese cuisine that became popular for its umami taste. It is frequently mistaken as a dish, but it is an ingredient used to create a variety of dishes.
However, miso is vulnerable to spoilage because of environmental and storage circumstances.
So, how long does miso last? Let’s find out.
How Long Will Miso Paste Last?
Miso paste could last one year if unopened and stored in the fridge. If there’s an expiration date, it should last from its printed date plus six months.
It is also known as soybean paste, a fermented food product with high salt content. It can be stored for a long time at low temperatures.
An opened miso could last up to a few months if properly covered and stored in the fridge.
You can store unopened miso in a dark place, but the refrigerated section is best to maintain its good quality.
Factors To Consider
An opened miso or soybean paste jar could keep its quality for around three months if stored at low temperatures. This is because the fermentation process of paste is still ongoing.
An unopened jar of miso could last a year from its manufacturing date. It can be stored for an extended time without ruining the taste.
If kept in a refrigerator, miso does not go bad. The miso flavor should maintain a consistency similar to when it was first made.
Miso is a fermented product that can last up to a year if stored in the fridge. It will not go bad because cool temperatures don’t kill the probiotics used in fermented paste.
Regarding the quality of the soup taste, these fermented soybeans should remain consistent for up to one year.
An unopened paste could last in the pantry for up to 1 year or best by date + 3 to 6 months.
Opened miso stored in the pantry at room temperature can only last for several hours, between 2 and 6 hours.
How To Properly Store Miso
The best way to store miso paste is inside the refrigerator. Cool storage is a great environment that allows the paste to keep its color and salty taste for a longer time frame.
If you wish, you can store it in a dry, cool pantry until it is opened. After opening, store it in the refrigerator to keep the color and flavor fresh for a long time.
“Food is our common ground, a universal experience.”– James Beard, American Chef.
You don’t have to put it in the freezer, but you can. Keep the paste away from all heat sources.
How To Tell If It Has Gone Bad
Miso paste goes bad in a warm environment. If there are molds that have developed around the surface of the miso, it is already spoiled.
If you notice a greenish-black discoloration on your miso paste, it indicates that it is already spoiled.
Discoloration occurs in warmer storage, so you better keep miso at a low temperature if you’re not planning to cook it yet.
Can you freeze miso paste?
Yes, you can freeze miso. But refrigeration is preferable. When freezing, use an ice tray to ensure distinct amounts for thawing.
You’ll have to chip or scoop it out using a clean spoon or clean utensils instead of a block. It is not recommended to freeze and refreeze miso.
Always use clean spoons when scooping miso to prevent cross-contamination.
Do you refrigerate miso after opening?
Yes, miso should be refrigerated to keep its best quality and prolong its shelf-life.
Cover it thoroughly so it’s sealed, then place another plastic wrap beneath the lid, directly over the paste.
The extra plastic wrap will keep the residual paste from oxidizing and microbial contamination.
Will expired miso make you sick?
Yes, eating expired miso soup can make you sick. Therefore, it’s best to carefully learn how to store or handle it to avoid this awful scenario.
Before you add miso paste to your recipes or make a bowl of miso soup with tofu and soy sauce, look for spoilage signs to see if your miso is harmful.
What should miso smell like?
Fresh miso should smell like clean and fresh because of its ethyl alcohol and salt content used to ferment it. You should not consider eating it if it doesn’t smell like this.
Miso is a perishable product that lasts up to 6 months past its printed date. Its shelf-life and taste prolong if stored in a refrigerator because cool temperatures don’t kill good bacteria.
Miso is a preservative food used to make vegetable dishes with miso soup and tabasco sauce. Because of its high salt content, it could last longer than other food.
However, it must also be refrigerated once opened to maintain its quality and taste. You can find miso in Asian grocery stores or local wet markets in your city.
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