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How to Store White Miso – #1 Best Tips!

How to Store White Miso –  #1 Best Tips!

If you’re a fan of the sticky, salty fermented beans called miso, then this is the article for you.

This post will offer clear instructions on how to store white miso paste so that it’s safe to consume.

How to Store White Miso?

White Miso Paste will last longer when it is stored in the refrigerator or freezer. It should be stored in an airtight container, and ideally placed on a lower shelf to ensure that the paste does not become too warm or too cold. If it is being stored in a freezer, make sure to use freezer bags, and remove any excess air so that there are no dangerous pockets of moisture inside the bag. It is recommended to store miso in a container with a tight-fitting lid, such as glass jars. Use it within one year when kept in the fridge. Close tightly after opening and store away from strong odors like garlic or fish.

The Story of Miso

Miso is anything but new. It has been around in Japan for thousands of years, and it has been a staple food for Japanese people since the eighth century A.D.

It is made by fermenting the beans and grains using bacteria, yeasts, and yeast cultures, which are known as Koji.

In the olden days, miso was only made in places where there were plenty of forests that had an abundance of Koji mold growing naturally on trees and fallen logs.

These days, miso is made in factories where the bacteria are grown on large trays of rice.

Miso Can Be Divided into Two Groups

White Miso 

White miso is a fermented product of soybeans, rice, and salt. It has a distinct flavor when compared to other types of miso.

The type of rice used in it is usually polished white rice which is called Iroko-mai in Japan.

The color and sweetness are also apparent in this type of miso. Hikari Organic Miso Paste is the most popular kind of white miso.

This is because it has a very mild taste and aroma, which makes it perfect for any type of soup. It is also referred to as sweet white miso.

Red Miso

Red miso is a fermented paste made from soybeans and red beans. It is mellower and darker than white miso.

Aged red miso becomes darker in color and richer in taste and flavor. Lohas miso is a special variety of red miso, which means it has no added sugar or preservatives.

It is also known as traditional yellow miso. It has a complex flavor and taste compared to other kinds of red misos because it contains more soybeans than the former varieties do.

What is White Miso Paste

White Miso Paste is made from soybeans, rice, and salt. It is then fermented for several months before being packaged for sale in stores.

Because of its fermentation process, it contains beneficial probiotic bacteria that will help maintain healthy gut flora.

The useful component in this type of miso is the Koji, which is a brewing yeast that converts starch into sugar. The Koji needs to be cared for to keep it alive and fermenting.

Does White Miso Need Refrigeration?

Once you purchase white miso paste from either an Asian market or an online retailer, it should be kept refrigerated at 35F (1.6C) and away from light and airflow.

This will help maintain the flavor quality for the longest time possible. A vacuum sealer or aluminum foil can also come in handy if you don’t have access to a refrigerator other than your kitchen.

Fresh miso paste is not pasteurized, and as a result, may contain harmful bacteria or parasites.

As the product ages, these items die off and the miso can last for many months outside of refrigeration if it is kept in an airtight container.

Is It Okay for White Miso Paste to Have A Layer of Solid White Mold?

It’s not uncommon for white miso paste to have a thin layer of solid white mold. This is not an indication that the miso has gone bad.

This is very normal! The mold is cultured from the rice and soybean mix and helps create the unique flavor profile of the paste. You can simply remove this layer before using it.

If you’re concerned about this kind of thing, it might be better to use yellow or sweet miso instead. They don’t contain as much koji and the molds tend to be less visible (although they are still present).

What Happens If White Miso Goes Bad?

White miso paste will spoil, but it spoils much more slowly than other types of food.

As mentioned above, it can last for many months outside of refrigeration if it is kept in an airtight container.

However, if you are unsure about the quality of the miso paste that you have then the best choice would be to throw it out and buy a new batch.

What Are Some Popular Uses for White Miso Paste?

White miso paste is a key ingredient in a variety of Japanese soups and stews. It can be added directly to soup stocks or added in the form of paste at the end of cooking.

The flavor that white miso paste lends is subtle, but it also complements many other strong flavors such as garlic, ginger, and onion.

White miso can be mixed with salt to create a type of seasoning salt that adds an extra layer of flavor to a variety of different foods such as stir fry or grilled meat and vegetables. It can also be used as a marinade for fish or chicken before grilling.

Where to buy Miso Paste?

Miso Paste can be purchased from a variety of retailers. Asian grocery stores typically carry white miso paste, as well as online retailers and sellers.

Because white miso paste is used in many different traditional dishes, you may find that you will be able to find it for sale at your local grocery store during certain times of the year such as Christmas, Thanksgiving, or other festivals.

What are The Conditions of Miso Paste Storage?

Miso doesn’t do well when exposed to heat or light because it will affect the quality of miso.

The best place, therefore, is a cool and dry place.

If you refrigerate it, make sure that it is not kept right next to another product or in the door where there is a lot of heat from the light bulbs.  

Also, I don’t recommend keeping on in your cupboard because this will result in condensation being formed on top of the can.

If you are going to use it within a year then it should be okay just leaving it in your cupboard; however, if you are not going to use it for a while then it’s better to store it in your refrigerator.

Storing miso with rice, or other grains, will delay the oxidation of the miso and also help control the temperature.

I recommend storing miso in a container with a tight-fitting lid, such as glass jars. Keep in the refrigerator and use within one year.

Close tightly after opening and store away from strong odors like garlic or fish.


When it comes to cooking with White Miso Paste, you need to take care to make sure that it is stored properly.

It can last for a while outside of the refrigerator, but it will not taste as good if you don’t keep it in a tight container away from sunlight and oxygen.

You should use your best judgment on whether the product that you have purchased is still good to use or not.  White miso paste would make a great gift item for people who are interested in Asian cuisine.