Homemade Miso Paste Recipe (A Simple Guide for Beginners)

Are you interested in fermenting your own probiotic-rich foods? If so, try this Miso Paste Recipe! You can easily create this healthy and flavorful Japanese condiment at home!

Looking for how to make white miso paste? Try this quick white miso paste recipe, ready in just one day!

Homemade miso paste.

I’ll walk you through the ingredients and step-by-step instructions. I hope you enjoy it!

Why You Will Love This Recipe 

  • This miso paste recipe is a beginner’s guide to making miso, packed with essential knowledge for success.
  • Create your own all-purpose Japanese seasoning with just three ingredients.
  • In this recipe, you can make a small batch of miso paste (yielding approximately 1 kg).

Miso Paste

Miso paste is a traditional Japanese condiment made from fermenting soybeans, koji, and salt. It adds a complex and unique umami flavor not only to miso soup but also to dressings, stir-fry sauces, and various dishes. To learn more, check out “What Is Miso Paste and How To Use It: A Beginner’s Guide.”

Recipe Ingredients

You’ll need the following ingredients to make this Miso Paste Recipe:

Ingredients for homemade miso paste.
  • Soybeans: Use dried soybeans. If you can find soybeans with high sugar and protein content, they are ideal for making flavorful miso. This recipe uses Toyomasari, a highly recommended Japanese soybean variety.
  • Rice Koji: There are two types of koji: dried and raw. Raw koji has a more robust koji mold, resulting in more delicious and fragrant miso. For first-time users, dried koji is recommended, as it is easier to find at a store and has a longer shelf life.
  • Salt: Refined salt produces a sharp and light miso, while mineral-rich sea salt creates a fuller and more flavorful miso. Choose the salt that best suits your preference.

Koji

Koji is an essential ingredient for making miso, soy sauce, and Japanese sake. It creates different enzymes, including ones that break down proteins (proteases) and starches (amylases). These enzymes help ferment and age the miso to give it a delicious flavor.

“Koji” is produced by cultivating the mold known as koji-kin (Aspergillus oryzae) on grains like rice, barley, and soybeans. For example, if the mold is grown on rice, it’s called rice koji. In making miso, rice koji, barley koji, and bean koji are all utilized.

Equipment

Here are some handy and essential tools for making miso paste.

  • Pressure Cooker: Use it to boil soybeans and significantly reduce the boiling time. If you don’t have it, cook them in a regular pot for about 1 hour until tender.
  • Food Processor: To save time, mash soybeans in a food processor. You can also use a masher or place them in a plastic bag and crush them with a rolling pin.
  • Fermentation Containers: Use food-grade plastic containers or glass bottles that are available at home. This recipe uses two 1000ml plastic containers.

How To Make Miso Paste: STEP BY STEP 

Here are some quick visual instructions! For the video and all the detailed ingredients and instructions, go to the printable recipe card below.

How to make miso paste.

Step 1

Soak the soybeans and cook in a pressure cooker.

How to make miso paste.

Step 2

Break rice koji into pieces and mix it with salt.

How to make miso paste.

Step 3

Mash the soybeans using a food processor until smooth.

How to make miso paste.

Step 4

Combine the mashed soybeans, rice koji, and sea salt.

How to make miso paste.

Step 5

Form the balls and pack them into the container, pressing with your fist.

How to make miso paste.

Step 6

Cover the surface with plastic wrap and place a weight on it.

How to make miso paste.

Cover the surface with a cloth to prevent bugs and dust, and store in a cool place. Let it ferment for six months to a year.

Recipe Tips

  • Step 1: The cooking time of soybeans depends on the type of pressure cooker you use. Always refer to your pressure cooker’s manual for specific cooking times and instructions.
  • Step 5: Removing air from the container is important, as gas can accumulate in gaps during fermentation and aging. Firmly shape each miso ball to squeeze out any trapped air before pressing it into the container.
  • Step 6: Wrapping the surface prevents mold growth. Tightly cover it with plastic wrap to create a barrier against air exposure and reduce the risk of mold formation.
  • Step 6: The weight should be approximately 30% of the finished miso. This recipe uses a 190 g can of food as a weight.

Where To Ferment Miso Paste

Miso fermentation takes place at room temperature, not in the refrigerator. Find a cool, dark place out of direct sunlight for your container. Suitable spots include a storeroom, basement, pantry, entrance area, or under-floor storage. In my case, I like to keep mine in a pantry under the stairs.

Tips for the Aging Period

  • Homemade miso usually takes 6 to 12 months to be ready, depending on your taste preference and environment.
  • A longer aging period produces a richer taste, while a shorter period gives a lighter flavor.
  • Miso is often prepared in winter because the cold temperatures reduce bacteria and mold, allowing fermentation to progress slowly and steadily. It starts fermenting slowly in spring, accelerates in summer, and then slows down again in autumn, deepening the flavors.
  • For your reference, if you prepare miso in February, it’s best to eat it around October (8 months later). If you prepare it in May, it’s best to eat it around November (6 months later).
  • If miso over-ferments, the aroma can become too strong, occasionally developing a sour taste or an ammonia-like odor.

One Month Fermentation Check

Homemade miso paste.

Once you start fermenting miso, check its progress after one month. You might notice a liquid rising to the surface—called “miso tamari.” Miso tamari is a highly concentrated miso extract that separates during aging. Don’t discard it! This liquid forms a protective layer, preventing the miso from direct air contact and safeguarding it from mold and bacteria.

If you don’t see any miso tamari forming, the weight may be too light. Add more weight and check again after a month. On the other hand, if the miso tamari is overflowing, the weight may be too heavy. In this case, try reducing the weight.

Dealing with Mold During Fermentation

Homemade miso paste.

If mold appears, remove the surrounding area with a spoon. If you see a fluffy white ring on the edge of the container, it is also a mold. Be sure to remove all of it and wrap the miso tightly to prevent air contact for further fermentation.

Signs of Properly Aged Miso: What To Look For

Here are things to look for to know if your miso is aged and ready to eat:

  • Color: Soybeans start off light brown, but as they age in fermentation, they gradually darken. When they reach a miso-like color, it’s a sign that it’s aging correctly.
  • Aroma: At the beginning of preparation, there isn’t much smell. However, as it ages, it develops a distinct miso-like aroma, then you’ll know it has been properly aged.
  • Taste: As miso ages, its taste becomes more profound and complex. Be sure to taste it. Take a piece of miso from about 1cm below the surface, mix it with hot water, and taste. Based on the taste, decide whether to extend or stop the fermentation.

Final Fermentation Check

Homemade miso 6 month.

This is my 6-month miso. It has a pleasant savory aroma, and the taste is rich in umami with just a hint of sweetness. I was aiming for a lighter color, but that’s okay. Due to the extremely hot summer this year, fermentation progressed quickly, deepening the color even within 6 months.

Storage

Once your miso reaches a preferred taste after fermentation, simply store the container in the refrigerator to stop the fermentation process. You can also store miso in the freezer. It doesn’t freeze solid; it may become slightly stiff, but you can still easily scoop it out and use it.

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Homemade miso 6 month.

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Miso paste one month.

Homemade Miso Paste Recipe (A Simple Guide for Beginners)

5 from 1 vote
Print Pin Save
Prep: 1 hour
Fermentation: 180 days
Servings: 1 kg
Author: Juri Austin
Are you interested in fermenting your own probiotic-rich foods? If so, try this Miso Paste Recipe! You can easily create this healthy and flavorful Japanese condiment at home!

Equipment

  • Pressure cooker
  • Food processor
  • Fermentation Container

Ingredients

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Instructions

  • Soak the Soybeans: Place the soybeans in a large bowl. Cover them with plenty of water and let them soak overnight. They should double in size.
  • Cook the Soybeans: Drain the soaked soybeans and transfer them to a pressure cooker. Cover with fresh water, close the lid, and heat over medium. Once pressure is reached, turn off the heat. When pressure is released, drain the soybeans, reserving the cooking water, and let them cool.
  • Combine Koji and Salt: Place the rice koji in a large bowl, break it into pieces, and mix it with the salt.
  • Mash the Soybeans: Mash the soybeans using a food processor until smooth. Add the reserved cooking water as needed to achieve a smooth paste.
  • Add Koji and Salt: In a large bowl, combine the mashed soybeans, rice koji, and salt. Mix thoroughly until all ingredients are well incorporated. If the mixture is a little hard, add some reserved cooking water.
  • Pack: Form the soybean mixture into balls. Pack them tightly into the container, pressing down to eliminate any air pockets.
  • Ferment: Cover the surface with plastic wrap to prevent air contact, place a weight on it, and store it in a cool and dark place. Let it ferment for six months to a year.
  • Store: Taste the miso, and when it reaches your desired ripeness, transfer it to a container for storage in the refrigerator.

Video

Notes

  • The cooking time of soybeans depends on the type of pressure cooker you use. Always refer to your pressure cooker’s manual for specific cooking times and instructions.
  • Removing air from the container is important, as gas can accumulate in gaps during fermentation and aging. Firmly shape each miso ball to squeeze out any trapped air before pressing it into the container.
  • Wrapping the surface prevents mold growth. Tightly cover it with plastic wrap to create a barrier against air exposure and reduce the risk of mold formation.
  • The weight should be approximately 30% of the finished miso. This recipe uses a 190 g can of food as a weight.

Nutrition

Serving: 15g | Calories: 37kcal
Course: Condiment
Cuisine: Japanese
Keyword: miso paste recipe
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  1. 5 stars
    Thank you for visiting the comment section. Here, you can leave me feedback with a star rating. Readers like yourself may find comments helpful when making one of my recipes. I hope you love this one as much as I do!