Fermented soybean paste

Doenjang 된장

Hello everybody! I know some of you have been waiting for my doenjang and ganjang recipes for a long time! Today I feel a real sense of achievement to release this recipe here. It’s one of the recipes in my cookbook, and whether you have my book or not, this video and recipe should still be useful to you.

Korean fermented soybean paste, called doenjang (된장), is more than just a seasoning or an essential ingredient in many iconic Korean dishes. It’s part of who we are as Koreans and how we see ourselves. A meal of rice, kimchi, doenjang-soup (or doenjang-stew), and  a few side dishes is for many Koreans, the definition of a meal: breakfast, lunch, or dinner. It’s impossible for us to imagine life without doenjang.


Salty, earthy, hearty, incredibly savory and delicious, it adds flavor to many dishes and makes them distinctively Korean. Making doenjang at home takes a long time, you have to be ready to commit to it for one year! It’s not hard to make, but takes patience and some hard work, and some special equipment. But as a bonus, Korean soup soy sauce (guk-ganjang:국간장) is a byproduct of making doenjang, so you get that delicious soy sauce for free!

Of course, you can always buy doenjang and guk-ganjang in a Korean grocery store, which is what most Koreans do. But the taste of store-bought can’t be compared to homemade doenjang and guk-ganjang, you will be knocked out over how delicious they are! And I’ve never found a brand of soup soy sauce in the store that satisfied me, which is why I always use fish sauce in my recipes as a substitute.

Besides the taste, making your own is fun and satisfying to eat. Over years of making, tasting, and fermenting these iconic Korean sauces, you’ll develop experience and sophistication in fermenting and eventually become a Korean food expert.

This video was a lot of fun to make. The recipe took me 2 years to develop, and the video took another year to film. It’s finally finished and I couldn’t be happier to share my recipe with you! Koreans traditionally start the process in the winter because the weather is good for drying soybean blocks. But I discovered that indoors, in my apartment in New York, any time is a good time to start making doenjang.

I hope you try it! Enjoy the recipe!

Special equipment

  • An electric mat or blanket, or ondol-style heating in your house
  • Cotton flour sacking or cheesecloth
  • Cotton butcher’s twine
  • A large shallow bamboo basket about 17 inches in diameter, or a large baking pan lined with waxed paper
  • Dried rice straw or hay that’s been well washed and dried (optional)
  • A cardboard box (an 18-x-10-x-7-inch box will hold 3 bean blocks)
  • A 4- to 5-gallon Korean earthenware crock (hangari) with a lid
  • A 5-quart Korean earthenware crock (hangari) with a lid
  • 3-5 dried jujubes (daechu)
  • 3-5 large dried hot chili red peppers (any variety; about 4 inches long)
  • 3 (4-x-1½-x-1-inch) pieces hardwood charcoal


Ingredients (for 10 pounds of doenjang)

How to make doenjang

Make meju blocks from soybeans
Blocks of crushed soybeans are called meju (메주) in Korean, and they’re the foundation of doenjang-making.

  1. Drain the beans and put them in a large heavy pot. Add water that is three times as deep as the beans, cover, and cook over medium-high heat for 1 hour.
  2. Turn the heat down to medium and continue cooking until the beans are soft enough mash easily, 4½ to 5 hours, checking to make sure the beans remain covered with water, and replenishing as necessary. Drain the beans in a colander.boiled soybeans
  3. Mash the drained beans to a paste in batches with a large mortar and pestle or in a food processor. Don’t finely grind them, leave some beans half-crushed.mashed soybeans
  4. Divide the mashed beans into 3 portions. Knead each portion with both hands and shape into a firm rectangular block measuring 6 x 3 x 4 inches.form meju meju

Ferment the meju

  1. Traditionally Koreans dry meju on the heated ondol floors of their homes, and if you live in Korea or have that kind of heating in your house, you can do that too. But in my NYC apartment I simulate ondol by putting an electric blanket on the floor. Line the blanket with a clean cotton cloth or waxed paper and set the blocks on top, or put them in an open basket. Set the heat to low. Dry the blocks, rotating them occasionally, until they are solid enough to hang, 3 to 4 days.meju
  2. Tie each block up in cotton twine and hang them. You can hang them outside but be sure to keep them covered and out of the rain, and if it’s too hot out they may rot. Inside, you can hang them from the ceiling with hooks. Wherever they hang, the spot should be cool and well-ventilated and all sides of the blocks should be exposed to air and not touching each other. Let the blocks hang for 6 weeks, until they are well dried out and smell a little pungent when you get your nose close to them.hanging meju
  3. Now it’s time to ferment the bean blocks. Place a layer of dried rice straw or hay in the bottom of a cardboard box that’s just big enough to hold the blocks with a little space between them; the straw will insulate the blocks and attract good bacteria like Bacillus subtilis in the air. (Don’t worry if you can’t find straw or hay; the blocks will still attract good bacteria.)
  4. Cover the box and put it on the electric blanket. Set the heat to low and let the bean blocks ferment for 2 weeks. At this point, the well-fermented bean blocks will smell a little earthy and pungent and will be covered with white, brownish-yellow, or sometimes greenish fungi. (These fungi change the bean proteins to peptides and amino acids, which will give the bean paste its delicious nutty flavor.)
  5. Tie the fermented bean blocks up in cotton twine and hang from the ceiling, as before, for 1 month.meju (fermented soy bean paste block: 메주)meju-fungus

Soak the meju in brine

  1. Wash the blocks in cold water and to remove the fungi. Place the blocks in a shallow basket or on a baking sheet lined with waxed paper and let them dry in the sunlight for 1 day, turning them until every side of each block is dried.meju drying in the sun
  2. Combine the 3½ gallons water (56 cups) and 5 quarts of the kosher salt (20 cups) in a large bowl. Stir with a wooden spoon until the salt is thoroughly dissolved.
  3. Set out a 4- to 5-gallon earthenware crock. Put 2 pieces of the charcoal on a gas burner; turn on the flame, and heat until they are glowing red. (If you don’t have a gas burner, use the broiler: Put the charcoal pieces under the broiler and turn it on; remove the charcoal when it is red.) Use tongs to transfer the charcoal to the earthenware crock. Drizzle the honey over the burning charcoal. Cover the crock and wait for 5 minutes.heating charcoal
  4. Remove the lid. You will see lots of smoke and smell a good caramel aroma. This process sterilizes the inside of the crock and will give the sauce good flavor.
  5. Remove the charcoal and wipe the inside of the crock with paper towels. Add the bean blocks and salted water to the crock. Add the remaining piece of charcoal, the jujubes, and dried hot peppers; they will float on the surface of the water. (The charcoal will attract and absorb any dust. The jujubes add sweetness and the dried red peppers help prevent the blocks from going bad.)meju soaking
  6. Cover the crock with flour sacking or cheesecloth and put on the lid. Let the blocks soak in the salty water until well fermented, 2 to 3 months. On clear days remove the lid and let the crock sit in the sunlight. Close it at night and be sure to keep the crock covered with the cloth so bugs and dust can’t get in. As time passes, the salty water will turn brown and smell like deeply fermented soy sauce.meju in sunlight

Separate the doenjang from the soy sauce

  1. Discard the charcoal, jujubes, and peppers. Transfer the soaked bean blocks to a large bowl. The blocks may have broken up during the soak, so use a bowl to scoop the soy sauce out of the crock and into a strainer set over another large bowl. Add any pieces of bean block to the bean block bowl. Save the soy sauce for making Korean soup soy sauce (gukganjang) later.
  2. Mix the doenjang with both hands, breaking it up into a paste, and transfer it to a 5-quart earthenware crock. Pack it down and sprinkle with the remaining ¼ cup kosher salt. Cover with the cotton cloth, secure it with a rubber band, and put on the lid.
  3. Put the doenjang crock in a sunny spot for its final fermentation. About twice a week on sunny days, remove the lid and let the sunlight shine into the crock through the cotton cloth. When it’s well fermented, the doenjang will smell sweet and taste salty and earthy, with a deep flavor. This will take 5 to 6 months. If it ever looks a little too dry on top, pour some of the separated soy sauce on top to make it moist again. You don’t need to stir it in.

Serving and storage

  1. Store the doenjang in the crock outside the house or at room temperature. Whenever you take some out, press the rest down with a spoon to keep out the air. Once in a while, take the lid off, cover with a cotton cloth, and let the sun hit it again.

Doenjang-making diary

Here’s a schedule of dates from a year of my doenjang-making. You might need to deviate from this timeline depending on how your project is going, but you get the idea of how long it takes and where you should be every month.

January 4 — Soaked the beans.
January 5 — Made the meju.
January 9 — Hung the meju up.
February 24 — Put the meju in a box with hay.
March 10 — Took the meju out of the box and hung them up.
April 10 — Washed the meju and let them dry in the sunlight.
April 11 — Soaked the meju in salty water.
June 11 — Separated doenjang and guk-ganjang.
June 22 — Made guk-ganjang.
December 1st — Doenjang was ready.



  1. Pidgeonfood Massachusetts joined 10/19 & has 1 comment

    Mangchi! 안녕하세요

    I am a big fan of yours! I am a chef and love all your recipes, thank you for posting so much content and for your cookbooks too :)

    I have two questions, I am about to make Doenjang, and I can only find “Thai” or Binchotan style charcoal as well as organic hay, will these work for making Doenjang? I posted a picture so you can see what I am using

    My second question is: if there is a lot of cloudy days where I am and I still hang my meju / put my Onggi in the window, will the recipe still work to be “disinfected” enough? I see a lot of your subscribers have bad mold growth from not enough sunlight

    Thank you!

    See full size image

  2. Osan888 Los Angeles joined 3/20 & has 1 comment

    Hi Maangchi, my meju have been drying for four days. There is some white bacteria but also a tiny bit of green. Is the green ok, or is that bad mold? Do I need to throw the meju out? Thanks!

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  3. CynMer Oroville, CA joined 2/20 & has 1 comment

    I’m a big fan of yours, Maangchi! After the meju blocks are hung to dry, your recipe says dry for 6 weeks. I have them hanging protected under porch ceiling. Where I live, the humidity is low, so not sure if they will need to hang for 6 weeks. Question is, Do the blocks need to be dry in the middle after hanging, before putting in the hay box to further ferment. Should they be dry all the way through? Thank you!

  4. Nono18 Transylvania joined 2/20 & has 2 comments

    Hi Maangchi! Today I made doenjang, which I think is very interesting. I’m looking forward to sniffing you!

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  5. natto la joined 1/20 & has 1 comment

    Hi Maangchi,

    I separated the soy sauce from the doenjang and now im fermenting the doenjang in a separate jar. There are little brown spotted molds forming on top. should i scrape and throw out and salt more?

    Thanks again!!

    See full size image

    • Inches Chicago joined 6/16 & has 33 comments

      You should probably scrape the top off, yes. Are you letting sunlight in? This helps disinfect the top and keep this from happening. Put a thin white cloth over top to keep bugs out but UV in through. You can also spread a layer of salt on the top after removing this growth to help prevent this from occurring again.

  6. LeeEiner Las Vegas, New Mexico joined 1/20 & has 1 comment

    I live in northern New Mexico, very low humidity. My meju also were not growing mold. They developed a nice funky smell after hanging for awhile but that went away also.

    I read NOMA fermentation guide and they say 86 degrees fahrenheit and 75 percent humidity is optimum for growing aspergillus mold, so, I put a plate in the bottom of a large crock pot, meju on the plate along with hay, and I poured in a shot glass of water every day so it goes to the bottom and doesn’t wet the meju directly. Lid on, of course.

    A week in and I have patches of white and green mold!

    Sharing this for those who also live in desert-like areas and can’t get their meju to go moldy.

  7. Inches Chicago joined 6/16 & has 33 comments

    I have my menu blocks drying by the fire. I’m excited to start my journey!

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  8. kjasonadams Singapore joined 12/19 & has 1 comment

    Maangchi thank you for the recipe. My 7yr old daughter and I have had fun trying this recipe. Lots of challenges trying this in Singapore but we’re at the stage of soaking our blocks with great results thus far. We had to make some changes for the heat and humidity but everything looks great! Thanks again.

  9. BryanH Malaysia joined 10/19 & has 1 comment

    Hi Maangchi, another great video from you.. Anyways, i cant seem to find any fermented soybean powder/flour here, after watching this video, was thinking if i can grinding the meju blocks down to be fermented soybean flour/powder?

    • Maangchi New York City joined 8/08 & has 11,851 comments

      Meju garu is actually not made with just meju but made with soybeans, rice, or wheat. I have never made meju-garu but someday I will post the recipe after learning how to make it.

  10. Danielb Israel joined 9/19 & has 3 comments

    I have maggots in my meju what should I do

  11. Danielb Israel joined 9/19 & has 3 comments

    Maangchi i have meju thin becous this i turnd to direction side and meju block no dry in the meju this duration is rot files after 4 day dry them electrical mat what do you do.

  12. Danielb Israel joined 9/19 & has 3 comments

    Hey i farmnted meju block 4 day in electrical mat 2 side and not dry enough in the meju and rot flies come in the meju i am start new now.

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