Your 101 Guide On How to Reheat Miso Soup!

Miso soup is a traditional food item in Japan. It’s the perfect dish for breakfast, especially when served hot. Often, we make (or order) more miso soup than we actually need because, you know, it’s miso soup; who would not want to have some extra?

Are you the one who throws leftover miso soup out, or do you wonder can you reheat miso soup later? If you are the latter one, keep reading to find out how to reheat miso soup.

Can you reheat miso soup? 

Yes, you can reheat miso soup. However, reheating the soup may remove some of the beneficial enzymes that the soup contains. Therefore, we advise you to reheat it correctly and gently. If reheated correctly and kept in an airtight container in the fridge, your soup is safe for consumption for up to 3 days.

How to reheat miso soup?

You can reheat miso soup by applying one of the following ways;

How to reheat miso soup on a stove?

Reheating miso soup on a stove in a small pan is the simplest method of reheating it. However, while rewarming the soup on a stove, make sure that you don’t boil it; this will destroy your soup.

To reheat miso soup on the stove;

  1. Take a small saucepan and pour the soup into it.
  2. Now place the saucepan on a stove. Keep the heat low initially.
  3. Slowly increase the flame to medium heat, ensuring that you don’t boil the soup.
  4. Keep the soup over the heat for 5-7 minutes or until the temperature reaches 165°F.
  5. Serve while it’s still hot!

Note: Make sure that you don’t boil the soup as boiling it will result in loss of flavor, and the soup texture will become grainy. 

How to reheat miso soup in a microwave?

Rewarming miso soup in a microwave is a fast and less tiring technique. You can avoid the risk of accidentally boiling it by stirring the soup frequently and keeping constant checks.

To reheat miso soup in a microwave;

  1. Transfer the soup to a microwave-safe container.
  2. Cover the container with a plastic wrap, and poke small holes in the plastic wrap.
  3. Reheat the soup at full power.
  4. Check after every 15-20 seconds and stir it every time you check the soup.
  5. The soup will be fully reheated in about 90-120 seconds.
  6. Let the soup sit for 30 seconds before serving it hot.

How to reheat miso soup in an oven?

Follow the given steps to reheat miso soup in an oven;

  1. Pour the soup into a bowl and place that bowl in a baking dish.
  2. Bake miso soup in the oven for 350°F.
  3. Keep it in the oven for 15 minutes, constantly checking to ensure that you are not boiling the soup.
  4. Once done, serve immediately.

Why is it important to not boil miso soup?

Boiling miso soup should be avoided because of the following reasons;

  • Boiling miso soup leads to the loss of its aromatic qualities. The soup can lose its subtle sweet and savory flavor and becomes sour if overheated.
  • Heating miso soup until it’s boiled will result in a loss of its nutritional value. It will also denature the enzymes present in miso soup.
  • Boiling miso soup will ruin its texture, making it grainy.

How long does miso soup last?  

Miso soup can last for 2 to 3 days when stored in an airtight container and kept in a refrigerator. It can last up to 2 months in a freezer, and at room temperature, it goes bad within 2 hours.  

How to store miso soup?

To store miso soup in the refrigerator, transfer it to an airtight container and keep it in the fridge where it will remain fresh for 2 to 3 days. To get the best results, separate any ingredient, like, tofu, seaweed, and onion, from the soup and then store it. 

However, if you only want to store it overnight, you can keep the solid items in the soup. Keeping the solid ingredients in the soup for more than 24 hours will make it go bad rapidly as these items go bad immediately after 24 hours. Taking tofu out of miso soup ensures that it doesn’t become soggy.

Can you freeze miso soup?

Yes, you can freeze miso soup for a shorter duration compared to its paste form. When kept in an airtight container with a proper seal, it can be well kept in the freezer for up to 6 months. 

With time, the container you kept your miso soup in will most likely expand, resulting in a freezer burn layer over the miso soup. You can avoid this problem by storing it in a larger-sized container and sparing some headspace for the container to expand.

How to freeze miso soup?

Before freezing miso soup:

  • Wait for about an hour for it to cool down.
  • Once it is cooled, start freezing it. If you want to pre-freeze it to later use it as an ingredient in another dish, simply put the soup in ice cube trays and wait for it to be completely frozen.
  • Once they are frozen, take the miso soup cubes out of the ice cube tray and transfer them to a freezer-safe bag.

However, if you don’t want to pre-freeze the miso soup, transfer it directly into a freezer-safe bag. Squeeze as much air out as you can before freezing it.

Note: Make sure to not leave miso soup for 2 hours at room temperature for it to be cool enough for freezing. Leave it only for 1 hour at room temperature before freezing it. 

Is miso soup good after a day?

When refrigerated in an airtight container, it is safe to consume miso soup for 2-3 days.

Does miso go bad in the fridge?

Thanks to the high salt content of miso, it can be preserved well in the fridge without going bad. If properly sealed, miso can last for up to 2 years. 

What temperature is too hot for miso?

The best temperature to heat miso is 114°F. Temperature hotter than this will kill the probiotics. 

Why does my miso soup taste sour?

If your miso soup tastes sour, it has likely gone bad. Drinking rotten miso soup can cause poisoning. Therefore, it is best to discard miso soup that has gone bad. 

Concluding our thoughts on reheating miso soup!

Yes, you absolutely can reheat miso soup. Use any of the methods we explained above and get the job done.

Just remember that overheating can destroy the nutrients and essential enzymes in the nutritious miso soup, so avoid overcooking miso soup. You should definitely avoid boiling it because doing so will make it sour and ruin the taste. 

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Immad Amir
Hey there, I'm Immad! I'm an SEO and appliance fanatic. Amna, my fiance, and I combined our interests and came up with RavvyReviews to help you all with our well-researched kitchen appliance reviews and foodie informative articles. We aim to learn more along the way and keep bringing you authentic trustworthy articles so all of us can have fun in the kitchen! We love interacting with you guys, do share yours thoughts in the comments. Get in touch with me through

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