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How to Make Miso Successfully

In old days there was a saying "Spend money to buy good miso than paying to a doctor." Indeed, miso has great health benefits as written more in details later. 

In Japanese, "my miso" means to self-praise "own things."  So if I write “my miso is good”, the chance of being believed may diminish. Nonetheless, until I made my own miso, it was unbelievable that the home-made miso is so fragrant and tastes good. The difference is perhaps similar to the comparison between the tomatoes from grocery and those from your own backyard.

Making miso is easy and economical. Every homemade miso should be good if done properly. The homemade miso is free from any preservatives, and not pasteurized.

Although there are varieties of miso, they may be classified into four major kinds as follows: (1) Edo miso, (2) shiro miso, (3) barley miso, and (4) soy miso. Shiro miso is also called amamiso because it has some sweetness. In the remainder of this article, how to make the four major miso will be explained first, and then medicinal merits of the miso will be described.

 

1     Traditional Way of Making Edo Miso

Edo miso is the most standard type of miso. We explain here how to make it in a traditional way. In a later section, we will write more innovative way of making miso, which may be favoured when a small amount to miso is to be made.

 

 

Materials

Soybeans 1Kg (2Lb)

Dry Koji[1] 1Kg (2Lb), or equivalent amount of fresh white koji

Salt 0.5Kg (1Lb, sea salt is preferred)

Equipments

Pressure cooker

2 gallon (8 liter) fermenting vessel

2 plastic bags[2]  (for example, 14"x18", 4 mil thick)

1  wooden drop lid

1  weight (see a later paragraph for possible ideas) or 1 to 2Kg of salt

 

Cooking and mashing of soybeans

Soak soybeans in ample water for 12 hours.  Cook it in a pressure cooker. Before closing the lid of the pressure cooker, make the water level in the pressure cooker same as that of soybeans. Heat at medium heat for 5 to 7 minutes after pressure rises.  If no pressure cooker is available, boil in a cooking pan at low heat until soybeans become soft (4 to 6 hours). 

Cool down the cooked soybeans until it reaches 140F (60C).  Mashing soybeans may be done by mashing in a plastic bag, by food processor, or by mashing rod, but by far easier is to mash it using a hand held electric blender (Figure 1).  Mashing soybeans while hot is the best way because as the temperature becomes lower, the soybeans become hard to crush.

Do not dispose the hot water but mash soybeans together with the hot water. 

 

Preparation of salted koji

The first thing in the whole process is to make salted koji, that is, to mix koji thoroughly with salt.  This process helps prevent koji from spoiling, particularly if fresh koji is made or purchased but not used immediately.

If dry koji is used, it must be soaked in warm water of 1/2 volume for 2 hours, and then mix with salt, at least a few hours before soybeans are cooked. 

 

    Figure 1  Hand-held blender

 

Koji-to-soybeans ratio

Before the World War II when the tenant system of farmers existed in Japan, the miso for landlords of farmlands and that for farmers were different. The miso for landlords had a higher ratio of koji to soybeans, while the ratio was lower for farmers so the farmer’s miso was cheaper. 

The higher the ratio of koji to soybeans, the more the flavor and sweetness of miso. The amount of koji to soybeans in our recipe for Edo miso is 1-to-1, which produces a landlord's deluxe miso.

An obvious question is what are the lower or higher limits of the ratio.   The higher limit of koji is 675g (1.5Lb), and the lower limit is 360g (0.8Lb), both with 450g (1Lb) soybeans and 225g (0.5Lb)  salt.

If you make koji by yourself, follow the instruction written in another article titled “How to make koji successfully”, or the book titled “Handboook of Making Sake, Shochu, Koji, Amazake, Miso, Natto, Mirin and More,” available at Amazon.com .

 

Container

The container for miso making should be about 1.5 times in volume of the miso to be made. The containers with vertical side wall are most preferable.  The capacity may be found using the chart in Appendix 3.   Wash the container carefully, and dry completely. 

The container for miso fermentation may be made of glass, ceramic or plastic. Plastic buckets of 5 gallons in the food grade may be available easily at a hardware store, but their side walls are not straight. For such, a few lids of different diameters need to be prepared so, as the height of the top of miso changes, use a different lid that fits. Do not use any metal container even if it is stainless steel. Stainless steel may be corroded although red colored rust may not be seen.

Recently fermentation vessels in the ideal shape are being sold online. See the figure below as an example.

 

Figure 2      1 gallon stoneware pickling crock, $40.

                     Other sizes are available from Ohio Stoneware

 

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Figure 3   A drop lid made of wood. 

 

Drop lid

This is a handy man's job.  The lid is used inside the fermenting vessel.  So the diameter must be smaller than that inside the vessel, but it must fit inside the vessel leaving only a very small gap.  See the figure below.

 

Figure 4     A split design of lid. Convenient if the mouth is narrow.

 

Weight(s)

Weights are very important.  If miso is made without weight, a harsh and sour product with strong smell of esters will be the result.  A suggested total weight is 30% of miso being fermented. There are many ways of finding appropriate weights.  Some ideas are:

·          Stones from backyard after thorough washing. Do not have to be a single piece.

·          A bottle, which just fits in the fermenting vessel, filled pebbles or salt, or water. One gallon bottle filled with water weighs about 4kg.

Figure 5    An example of fermentation vessel and weight for the Edo miso

 

  • If you do ceramics as hobby, making weights can be a good project. Make cylindrical weights with flat top and bottom, and a handle to hold the weight.

 

Figure 6    Illustration of miso fermentation vessel

 

                                

                       Figure 7    Ceramic weights (980g a piece)

 

·          Salt may be used as weight. The specific gravity of salt is high, and salt in a plastic bag is flexible in shape. If salt in a plastic bag is used as a weight, a lid on the top of miso is not needed. See Section 8.6 Innovative Miso Making for specific applications of this approach.

 

Setting soybeans for fermentation

The mixture of soybeans, koji and salt must be soft like peanut butter. If harder, add a warm water and mix. Throw the mixture of salted koji and soybeans in a soft ball size into the containment for fermentation.  Squeeze the content to eliminate any possible air bubbles.   Smooth out the top surface of the mash. Put the drop lid as shown in Figure 6.  Spread a small amount of salt at the edge of the lid.  If salt is to be used as weight, read Section 8.5 for more information.

 

Aging

Recommended aging period for Edo miso is 6 to 9 months, which is hard for the beginners to wait.  Fortunately, the homemade miso tastes good even with only 3 months of aging. The miso being aged should be placed at a cool place in the house, but not in a refrigerator.  However, even temperature goes up in summer, do not worry about it as far as the top is pressed with the weight. During the fermentation, the proteins in soybeans are decomposed by the protease, which is one of the major enzymes of koji, to amino acids and umami.

 

Turning over

One month after the aging starts, open the lid.  The miso must be mixed so the bottom and top are turned over.  The purposes are (1) to make the mixture of soybeans, koji and salt as homogeneous as possible, (2) to remove the gas generated during the aging process, and (3) to expose to fresh air briefly.  When finished, repack just as the initial packing. 

If any mold is found on or around the drop lid, remove it using paper towel. It is not possible to make miso without seeing white mold, which is the sign that fermentation is in progress.  If black mold is found, remove it carefully.  Then, sterilize the lid with shochu or brandy, and dry. 

The bacteria, aided by enzymes in the koji, start the natural fermentation of soybeans and koji. Proteins and oils are gradually converted to simple amino and short chain fatty acids.

 

2   White Miso

In Kansai district of Japan, white miso is popular. The procedure of making white miso is almost same as the Edo miso except the amount of koji is doubled with a reduced amount of salt, and the fermentation period is much shorter. White miso is less salty but rich in koji and very delicious. Recommended amounts of ingredients for white miso are (1) soybeans 500g, (2) koji 1000g and (3) salt 150g.  The cooking and mixing procedure is the same, but the aging period is only 2 to 3 weeks. The short aging period for white miso is a great advantage.

 

 

3   Barley Miso

Barley miso has a special fragrance, which you may be addicted to. It can be used not only to replace regular miso, but also good as condiments of cooked rice.  The procedure of making is same as for the regular miso.

 

Materials for barley miso

Soybeans 450g (1Lb)

Barley Koji made from 450g (1Lb) barley

Salt 160 g (0.35 Lb, sea salt is preferred)

 

Barley koji is not available in ordinary store even in Japan, so it has to be made by the procedure written in the book titled “Handbook of Sake …” mentioned earlier.

The amount of salt is reduced to 70% of the regular miso written in Section 8.1. The ratio of barley to soybeans remains the same. Fermentation of barley miso goes faster, so you may be able to serve it after 2 months aging.

Another way of using barley is to replace only a portion of soy in the regular miso by barley.  The miso using a partial amount of barley still has a unique flavor.  For example, a portion (up to a half) of the soybeans may be replaced by the barley in the traditional premium miso, while using the same amount of rice koji.

 

4    Soy Miso

Soy miso is also called aka miso.  Soy miso does not use rice koji but uses soy koji. Therefore, making soy koji is necessary. 

Fermentation period for soy miso is 1 to 2 years, which is the longest compared to other miso. 

 

Materials

Soybeans 1.8 Kg (4 Lb)

Sea salt 450 g (1 Lb)

White koji kin 1 g

Procedure

·         Pulverize soybeans to ¼ size sing a mixer or food processor.

·         Soak the pulverized soybeans in water overnight. Steam cook the soybeans for 4 hours. (Do not use a pressure cooker because we don’t want to make soybeans soft.) At this time, beans are cooked but not soft. Cool the soybeans to 40 degrees C. Transfer to the incubator vessel. Spread the koji spore just like when making rice koji. Incubate to grow koji fungus in a warm place. It may take 3 or four days until the soy koji is completed.

·         Make soy miso in the same procedure as Edo miso is made.

·         Open the soy miso when one month is elapsed, and mix the content upside down.

·         Ferment for 1 to 2 years. It is important that the fermented miso is under a weight.

 

5   Innovative Miso Making

In the previous sections of 1 through 4, traditional ways of making Edo miso, white miso, barley miso and soy miso were explained. Beginners in making miso may wish to make a small amount of miso. The method explained in this section is significantly simpler than the standard method and cheaper in preparing the equipments.

Among the four varieties of miso, the white miso is the simplest because its fermentation period is the shortest. Thus we explain how to make the white miso in the innovative way.

·         We use a small fermentation vessel (1 gallon) as illustrated in Figure 8. 

·         No solid weight nor a lid is used. Instead, salt in a plastic bag is used as weight. Fermentation vessels of any cross sectional shapes, including circular or elliptic shape, may be used. Side wall does not have to be straightly vertical.

·         The same ingredients as mentioned in Section 2 are used. The weight ratios of the materials are same as in Section 2 except the total weight of miso become about  3Kg.

 

Materials (for white miso)

Soybeans (raw) 500g

Koji (white or yellow) 1Kg

Seasalt for miso 150g

Tool

Fermentation vessel like in Figure 8.

Salt  1400 g (2 packs of iodized salt available at gocery) for weight in doubled soft ziplock plastic bags

 

 

Figure 8   1.1 gallon Rubbermaid canister and 1.4 Kg salt in doubled ziplock bags.

 

Cooking procedure is same as stated in Section 2. Place the salt for weight in double ziplock bags and seal.  Put it directly on the top of miso.  Place the lid or cover the vessel with a plastic sheet and tie with a piece of string. Once packing is finished, place the vessel where no dilect sun light reaches. The fermentation period is 2 to 3 weeks.  The miso made in this way can be kept without placing in fridge, but if is not used soon, keep the content in the fridge.

 

Figure 9  1.1 Rubbermaid canister packed with miso and solt in ziplock bags

 

For Edo miso, use the same materials as mentioned in Section 1. The weight ratios of the materials are same as in Section 1 except the total weight will be about 3Kg. The following is the material for Edomiso:

 

Materials (for Edomiso)

Soybeans 675g  (1.5Lb)

Dry Koji 675g (1.5Lb), or equivalent amount of fresh koji

Salt 338g (0.75Lb, sea salt is preferred)

Tools

1 gal plastic fermentation vessel

Salt  1400 g for weight  in doubled and soft ziplock plastic bags

 

Cooking procedure is same as stated in Section 8.1. Place the salt for weight in doubled ziplock bags and seal.  Put it directly on the top of miso. Cover the vessel with a plastic sheet and tie with a piece of string. Once packing is finished, place the vessel where no dilect sun light reaches. The fermentation period is 3 to 6 months. When 2 months are passed open the top plastic and weight. Mix the miso upside down, and then repack

 

 

6   Recipes Using Miso

 

Miso pork cutlet

Materials

3 tablespoon salad oil

6 tablespoon homemade white miso

3 tablespoon sugar

1 tablespoon soy sauce

1 teaspoon sake

1 cup dashi soup (1 teaspoon dashino-kona in 1 cup water)

1/4 lemon

1/2 head cabbage

4 pork slices (1/4 Lb per 1 cutlet)

1 egg

Equipment

Regular tools appropriate for preparing pork cutlets.

 

  • Sauce: In a saucepan, boil water with the dashino-kona for a few minutes.  This is the dashi-soup.   In a small ball, add salad oil, homemade miso, sugar, soy sauce, sake, dashi-soup, lemon juice, and blend well. 
  • Shredded cabbage:  shred cabbage into very thin sticks.  Soak in water for 30 minutes, and drain in a strainer.
  • Pork cutlet: sprinkle salt and pepper on pork, then coat with flour.  Dip in stirred egg, and then coat with breadcrumb.  Deep fry in ample salad oil. On a serving dish, add the shredded cabbage first, and then pork cutlet.  Put the miso sauce on the top of cutlet.

 

Vegetable Miso Soup

Materials for 2 servings

2 cups water

1 teabag style dashino-kona (or 1 teaspoon powdered  dashino-kona)

1/4 cup condiment: any one of wakame, tofu, chopped daikon and others (see the next Table)

2 to 3  teaspoon miso

1/2 green scallion thinly shopped.

 

  • Boil water with the dashino-kona gently for 3 minutes.
  • Add a selected condiment and shimmer a few minutes. 
  • Stop heating. Then add miso. 

(Add miso only after stopping heating.) 

  • Serve in cups or soup bowls and garnish with scallion.
  •  

Table 1   Top 10 contents of miso soup in Japan

  #

Material

  1

Tofu

  2

Wakame (see weed)

  3

Abura age (fried tofu)

  4

Green onion

  5

Potato

  6

Daikon (radish)

  7

Onion (round)

  8

Nameko (mashroom)

  9

Shijimi (fresh water shell fish)

10

Satoimo (yam)

 

Miso Pickles

Root vegetables (carrots, turnips, and radish), celery, cabbage, and Chinese cabbage can be pickled in miso.  Crisp and lightly pickled vegetables can be a part of every meal. Miso pickles can be easily prepared and ready to eat in 1-3 days. In addition to the variations below, try pickling other vegetables. For a stronger flavor, pickle longer but serve smaller amounts. Very strong-flavored pickles can be minced and sprinkled over rice.

 

(1) Place 1/2-inch layer miso in bottom of a non-metal container.

(2) Add vegetables and cover with more miso.

(3) Cover container and let sit for 2-3 days.

(4) Remove vegetables, rinse, and serve.

(5) If desired, cut vegetables into matchsticks before serving.

 

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Figure 9   Teabag type dashino-kona

 

Fish and meat cured with miso

The procedure is exactly same as pickling vegetables except the cured fish or meats are baked on a fry pan with a small amount of oil:

(1) Place ½ inch layer miso in a non-metal container.

(2) Add cut fishes or meats and cover with more miso.

(3) Cover container and let sit for 2-3 days.

(4) Remove fish or meat, rinse. 

(5) Cook the fish or meat in a frying pan with a small

      amount of oil.

The fish cured in this way has a good flavor of miso.  Meats become very tender even if it is shank.

Do not reuse the miso once used to cure fish or meat.

 

7   Health Benefits of Miso

Soybeans contain rich proteins, linoleic acid, vitamin-E that help activate the brain. Miso contains lactic yeast and more than 160 live micro biotics.  They enter human intestinal tracts alive and promote lactic acid in intestine. The lactic acid enhances the natural and acquired immune systems, that help reduce the chance of infection by viruses. A summary of miso benefits is given in Table 2.  See also footnote[3].

Miso also has the effects of eliminating toxic substances.  Enzymes of miso help digest other foods.  These benefits are available only by eating the unpasteurized miso, that is not the case with ordinary miso from groceries.

 

Table 2   Effects of miso at a glance[4]

Nutrients

Origin

Effects

Brown pigments

soybeans

Inhibits generation of lipid

colin

soybeans

Prevents aging. Prevents fatty liver

Enzymes

koji, lactic acid, bacteria

Helps digestion, and immune systems

Fiber

Soybeans

Reduces cholesterol

Isoflavon

Soybeans

Antioxidant, prevents breast cancer, prevents colon cancer

Lecithin

Soybeans

Reduce blood cholesterol

Protein

Soybeans

Helps blood vessel elasticity

Prevents cerebral apoplexy

Saponin

Soybeans

Inhibits lipid peroxide

Reduces blood cholesterol

Prevents hardening of arteries

Prevents hepatopathy

Trypsin inhibitor

Soybeans

Prevents diabetes

Anticancer

 

 

To get such fresh miso, one has to go to a local miso makers in Japan or make by yourself. Most of miso sold in the market are pasteurized so the micro biotics do not exist, and the precious enzymes have been eliminated. The only sure way to get these wonderful medicinal benefits is to make miso by yourself or get from someone who makes miso by himself/herself.

The following paragraph is an excerpt from "Culinary Treasures of Japan" by John Belleme and Jan Belleme, published by Avery Publishing Group.  Miso's outstanding medicinal qualities have been confirmed by scientific research. Dr. Shinichiro Akizuki, director of Saint Francis Hospital in Nagasaki, devoted his career to researching the use of foods, such as miso, as preventive medicine. Although Dr. Akizuki spent years treating atomic-bomb victims at just a few miles from ground zero, neither he nor his associates suffered from the usual effects of radiation. Dr. Akizuki hypothesized that he and his staff were protected from the deadly radiation because they had miso soup every day.

Miso, a fermented soy food, is one of the world's most delicious, versatile, and medicinal foods. This ancient Far Eastern staple food recently began appearing on natural foods store shelves in the West but has already established itself as an essential ingredient in the new natural cuisine. Miso is used to enhance every course from hors d'oeuvres to desserts. It is used in basic macrobiotic dishes as well as fancy gourmet fare. It is no wonder that miso quickly became popular among health-conscious Americans.

A good source of essential amino acids and some vitamins and minerals, miso is also low in calories and fat. Miso is rich in isoflabon.

Centuries of Japanese folklore and recent scientific studies indicate that the daily use of miso may lower cholesterol, alkalinize the blood, cancel the effects of some carcinogens, counteract the effects of radiation exposure, and neutralize the effects of smoking and environmental pollution.

Like yogurt, unpasteurized miso has abundant lactic-acid bacteria and enzymes that aid in digestion and food assimilation.

In 1972, Akizuki's theory was confirmed when researchers discovered miso contains dipicolonic acid, an alkaloid that dispels heavy metals, such as radioactive strontium, from the body.

Scientists at Japan's Cancer Research Center found in 1981 that those who regularly ate miso soup suffered significantly less than the norm from some forms of cancer and heart disease. More recently, researchers at Tohoku University, Japan, isolated substances in miso that cancel out the effects of some carcinogens.

The most convincing evidence demonstrating the protection miso offers to those exposed to radiation was published in Japan in 1990. Professor Akihiro Ito, at Hiroshima University's Atomic Radioactivity Medical Lab, read newspaper reports of European countries importing truckloads of hatcho miso after the accident at the Chernobyl nuclear power plant. Professor Ito reasoned that if people were protected from radiation by miso, then rats that were fed miso and radiated should develop less cancer than radiated rats that were not fed miso.

Professor Ito was not surprised to find that the liver-cancer rate for the rats that were not fed miso was 100 to 200 percent higher than that of miso-fed rats. Even more extraordinary is the fact that Ito used commercial miso powder, the lowest quality of miso.  Many natural healers and traditional Oriental physicians consider long-aged misos, such as hatcho miso, the most medicinally potent.

The brownish pigment in long-aged miso is melanoidin, which are anti-oxygenic, antiaging, and creates umami by decomposing protein. It also prevents high blood pressure, suppresses cancer. Brown color of soy sauce is also due to melanoidin.

White miso does not include melanoidin, but the amount of koji is much greater than in other kinds of miso. Therefore, white miso has more medicinal benefits directly inherited  from koji. 

 


Handbook of Making Sake, Shochu, Koji, AmazakeMisoNattoMirin and More

Second Edition, Authored by Shoichiro Nakamura, 2023

 Available at Amazon.com

 

 

 



[1] Koji is very expensive if you buy.   However, it can be made relatively easily.  See Chapter 2 "How to make koji." 1 LB dry koji is produced from 1.1 LB uncooked rice. If fresh koji (undried koji) is to be used, use 1.2 LB of fresh koji.

[2] Supplier for a large quantity:  Freund Can Company, 155 W 84th St, Chicago, ILL 60620-1298, fax 773-224-8812, tel 773-224-4230, www.freundcan.com. Suggested item to buy:Stock # FH1418 $20.76 for 500 heavy industrial bag (4 mil) of 14"x18", Spring 2000 catalog (price may change).

[3] Nutritional Science of Soy Protein (Japan), Vol.11,No.1, 1990

    http://www.fujioil.co.jp/daizu/srj/eng/headline/head11e.html

[4] http://www.miso.or.jp/miso-e/effect/effect.html