The real soul of Sichuan cuisine — Doubanjiang with a homemade recipe you can try when the board beans are harvested.

What’s Doubanjiang

Doubanjiang, also known as Sichuan sauce or Board bean chili paste, is a traditional Chinese condiment made from fermented broad beans. It is considered the soul of Sichuan cuisine. It has a pungent, salty flavor and is often used in stir-frying dishes and stewed dishes.

Doubanjiang (豆瓣酱) literally means bean paste. There are several versions popular in different areas in China. Sichuan Doubanjiang is made from broad bean (fava beans) instead of soybean. There are two sub-versions—one is red oil doubanjiang, which is relatively easy to make and quite popular in housewives’ kitchen; the other one is famous Pixian doubanjiang produced in a small area named as Pixian of Sichuan province. Due to the excellent water sauces, great weather condition and ancestral recipe, Pixian Doubanjiang has its unique flavor and enjoys a high reputation all over world. Pixian doubanjiang usually goes through quite long fermentation time under sunshine. The prices vary based on the fermentation years. But the main market for Pixian doubanjiang is outside Sichuan province. It is quite sad that the tradition is losing due to the city development. Instead of using traditional fermentation method, modernized production lines are widely adopted to improve the outputs. However we are lucky as there are still some brands (Pi’xian Doubanjiang on amazon: Sichuan / Pixian / Pi Xian Broad Bean Paste 16OZ (454g)) to trust. If you meet premiere three-year doubanjiang, do not miss it at whatever price.

Common housewives in Sichuan province love to make their own Doubanjiang at home. The homemade Doubanjiang is produced by a simpler process but yield great tastes too. My family has the tradition to make Doubanjiang each year, making several large jars in turn and exchange with family members. We usually call homemade doubanjiang red oil doubanjiang, because usually a layer of oil is used to separate the doubanjiang from air.

Homemade red oil doubanjiang

Caution: the following is an extremely long post, as I am trying my best to explain everything in detail. Making a jar of doubanjing is comforting and enjoyable, but also time-consuming and expensive. If you plan to try it at home, please know the most important fungus during the process: Aspergillus oryzae, how it works, and the best conditions.

I thought homemade doubanjiang can be quite easy after watching my mother and grandma making them a year and year again. But it is true only if you are in China because we are making our homemade doubanjiang based on an essential ingredient—fermented broad beans(霉豆瓣). There is almost no chance to find fermented broad beans outside China, even outside Sichuan. So I went back to my hometown this year and make my own batch from just dried fava beans under their directions.  I only start with a small batch and yield around 1.5 kg doubanjiang at last(in the little earth jar shown in the above picture).

My mom did not make fermented broad beans previously but my grandma did. I have double-checked with her and tried several batches using natural fermentation in my apartment. Guess what? All of the tests failed. After reading lots of articles and papers, I found out the reason is the environment-my apartment. Fungus widely exists in my grandma’s yard as she makes fermented foods each year, but my apartment is too clean so there are very few starters around. So I further find out a shortcut and saver way–using the kit for the fermentation. Koji kit is the sprouts of Aspergillus oryzae. After being loaded with the sprouts, broad beans can be fermented in a short time and meanwhile reduce the chance to be infected by other harmful fungi.

Firstly soak the beans overnight with enough water and then drain.Transfer the beans to a steamer and steam for 20-45 minutes based on the hight of the layer until just well cooked (when you break them in halves in hand, there is no raw part inside, but the beans should not be too fragile to smash easily). You can taste the beans. They should be slightly stiff but well cooked already.

After steaming, transfer the beans out immediately and spread to cool down. In summer, make sure they are cooled down completely. Then mix the starter with 3g flour. The powder in the small spoon is the starter I use, known as koji kit (koji mold spores). You can purchase a Japanese version from amazon.

Spread the starter to the beans and massage with hands to make sure all the beans are loaded with starter.

Then flat them and cover with a wet clean cloth (I soak the cloth in cooled boiled water and please keep the cloth away from the beans). Place on a baking cooling rack so there is air going through underneath and place in shadow place (try to avoid sunshine). Keep the temperature between 30 to 36 degree C and the air humidity around 80% (at least 70%).

If weather condition is great,  it should look this after several hours.

Then after another 12  to 16 hours, it looks like this.

Lovely? I watch them for minutes.

After another 12 hours to 16 hours, the white hair turns yellow.

When the hair turns yellow, stop the fermentation via drying under sunshine.

After one day drying under sunshine, it looks like. That’s the fermented broad beans(霉豆瓣).

Wash the beans under running water gently and drain. Then add 30ml Chinese white spirit (白酒), 250ml cooled boiled water and 50g salt.Mix well and fermented for 30 hours to 40 hours (covered).

Then you will get this.

Wash the pepper and air dry for 5-10 hours. And then cut into small pieces. Add around 40g salt and set aside for 1 hour before mixing with the beans.

Scoop the red peppers to the beans and discard the extra liquid at the bottom. Mix in spices, 50ml oil and 2 tablespoons of fermented sticky rice (you can skip this if hard to acquire). And transfer the mixture into the pot.

This is optional! In the first 7 days, place in warm place (under sunshine ) and uncover by day and half covered by night.
Add oil to cover the doubanjiang (3-4 cm higher), cover the lid and place in warm place. Then we pass everything to time. Let it ferments for at least 3 months before enjoying. Use cleaned tool to scoop the sauce out and it can be kept for 2-3 years.

After three months. Homemade red oil doubanjiang has a lighter and brighter color comparing with Pixian doubanjiang.

Homemade red oil doubanjiang

Doubanjiang | Broad Bean Paste

My grandma’s secret recipe to make real Sichuan red oil doubanjiang
5 from 16 votes
Print Pin Rate
Course: pantry, sauce
Cuisine: Sichuan cuisine
Keyword: Broad Bean
Calories: 181kcal
Author: Elaine

Ingredients

  • 150 g dried board beans , peeled
  • 0.3 g kit starter
  • 800 g to 1000g fresh pepper
  • 3 tbsp. minced ginger , optional
  • 30 ml white spirit , or other hard liquor
  • 250 ml cooled boiled water
  • 50 g for beans +40g (for fresh peppers) salt
  • 2 tbsp. fermented sticky rice
  • oil as needed
  • a Jar

Spices (you can replace them with 1 tbsp. Chinese five spice powder)

  • 2 star anises
  • 3-4 bay leaves
  • 1 tablespoon red Sichuan peppercorn
  • 1 small piece of Chinese cinnamon
  • 1/4 teaspoon cloves
  • 1/4 teaspoon fennel seeds
  • 1 tsaoko
  • 2 cardamons

Instructions

Make fermented fava beans

  • Firstly soak the beans overnight with enough water and then drain.Then transfer the beans to a steamer and steam the board beans for 20-45 minutes based on the hight of the layer until just well cooked (when you break it in halves in hand, there is no raw part inside, but the beans should not be too fragile to smash easily). You can taste the beans. They should be slightly stiff but well cooked already.
  • After steaming, transfer the beans out immediately and spread to cool down. In summer, make sure they are cooled down completely. Then mix the starter with 3g flour.
  • Spread the starter to the beans and message with hands to make sure all the beans are loaded with starter.
  • Spread the starter to the beans and message with hand to make sure all the beans are loaded with starter.Then flat them and cover with a wet clean cloth (I soak the cloth in cooled boiled water and please keep the cloth away from the beans). Place on a baking cooling rack so there is air going through underneath and place in shadow place (try to avoid sunshine). Keep the temperature between 30 to 36 degree C and the air humidity around 80% (at least 70%). Wait for 24 to 48 hours until the white hair turns yellow.Stop the fermentation via drying under sunshine.

Make Doubanjiang mixture

  • Wash the beans under running water gently and drain. Then add 30ml white spirit, 250ml cooled boiled water and 50g salt.Mix well and fermented for 30 hours to 40 hours (covered).
  • Wash the pepper and air dry for 5-10 hours. And then cut into small pieces (I chop ginger along with peppers). Add around 40g salt and set aside for 1 hour before mixing with the beans.
  • Scoop the red peppers to the beans and discard the liquid on bottom. Mix in spices, 50ml oil and 2 tablespoons of fermented sticky rice. And transfer the mixture into the pot.
  • This is optional! In the first 7 days, place in warm place (under sunshine ) and uncover by day and half covered by night.
  • Add oil to cover the doubanjiang (3-4 cm higher), cover the lid and place in warm place. Them we pass everything to time. Let it ferments for at least 3 months before enjoying.

Nutrition

Serving: 100g | Calories: 181kcal | Carbohydrates: 10g | Protein: 3g | Fat: 14g | Saturated Fat: 1g | Sodium: 2356mg | Potassium: 294mg | Fiber: 2g | Sugar: 3g | Vitamin A: 640IU | Vitamin C: 96.3mg | Calcium: 30mg | Iron: 1.5mg

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191 Comments

  1. Hi! I am about to start making this lovely recipe but have a quick question. Once you leave it to ferment for 3 months, does the lid need to be kept closed at all times? Or should you open the container occasionally? Also, should the container be away from sunlight during the 3 month fermentation? Thanks!!

  2. Hi, so I am in the fermenting stage but there is some white film bubbling on top of the oil layer. I took it off as looks a bit like mould. Is this an issue? Is it normal?

    1. Janet,
      I suggest you use a sterilized tool to remove the bubbles and let it uncovered for couple of days.

  3. Hi, regarding the fermented sticky rice, what’s the best stage to use it? Is it when it’s still very sweet and less alcoholic or the more alcohol the better (aged longer)? Oh, and do you only use the liquid or the rice only or mixture of both?

  4. Hi, I’m planning to use the fermented sticky rice. Fermenting it for 3 days and 2 nights the sweetness will be at its peak, and more than that it’ll turn more alcoholic. What’s the best stage to use the fermented sticky rice? Also, do you just use the sticky rice or just the liquid or mixture of both? Thanks for the recipe!

      1. Hi, just to further clarify, when you said finished the rice fermentation, it’s the more alcoholic ones right, like it’s actually rice wine? I could make rice wine by fermenting it for roughly 3 weeks.

        Thanks for the recipe and the reply. I hope you don’t get annoyed by me. Because this is such a long fermentation I want to make sure I’m doing it right!

        1. Hi Bo,
          Thanks for contacting again. I am always love to help. Please note that Chinese sticky rice is different from the rice wine from Japan. So there is no need to ferment for 3 weeks. If you make your own fermented sticky rice, I recommend reading this post. I suggest a 1 week around fermentation before using. I hope this can help!

  5. Hello! Thank you for sharing this recipe, it seems easy to follow and I’m excited to give it a try! Doubanjiang is one of my favorite ingredients.

    I might have missed this in your description, but what is the purpose of the sticky rice? Is it just an extra way, along with the koji, to start fermentation?

    1. Jen,
      It provides extra aroma. Yes you can think that it is a helper with koji in flavors. But it is ok to skip this.

  6. My doubanjiang has been fermented 4 months and seems ready to use. Should the whole spices be removed or should the doubanjiang be processed to grind the spices?

  7. Hi Elaine, love your website! I have a batch of doubanjiang fermtinfg in a jar since March. I used whole spices in mine. My question is if the finished sauce should be processed in a blender at the end to grind the spices or shoud iremove the whole spices to use the doubanjiang? Sorry if I posted twice. I asked the same questiona month ago, but cannot find my prior comment. Thank you!

  8. 5 stars
    I love your containers! Did you ferment the doubanjiang in that storage jar? Where can I get that jar? Excited to try the recipe.