Making Sweet Red Bean Paste (Anko) from scratch is easier than you think! You only need 4 ingredients for this recipe. I‘ll show you how to make tsubuan (chunky paste) and koshian (fine paste) so you can make delicious Japanese sweets at home.

Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

Do you love Japanese sweets and desserts? If you’re like me who enjoy eating them all, then it’s time to make Anko (餡子) aka sweet red bean paste! It is the most basic and favorable filling in traditional Japanese confectionery and pastry.

Whether it’s Daifuku Mochi, Dango, DorayakiTaiyaki, Manju, or Anpan, they are filled with Anko and bursting with the deep, sweet flavor of red beans. So let’s learn how to make Anko red bean paste today!

Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

What is Anko?

Sometimes known as An (餡), Anko (餡子, あんこ) is a Japanese sweet red bean paste made from azuki beans. It is the most common filling used in many Japanese sweets. In fact, you can find sweet bean paste in many other Asian pastries and desserts.

In Japanese cooking, the word “Anko” or “An” usually refers to a red bean paste, but it also implies other varieties such as:

  • Shiroan (白あん) – made from lima beans or butter beans. Learn more about it on White Bean Paste (Shiroan) post.
  • Kurian (栗あん) – made from chestnuts.

How to Make Anko

It is usually prepared by boiling azuki beans, sometimes mashing them, and then sweetening the paste with sugar.

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Azuki, or sometimes written as Adzuki, literally means ‘small beans (小豆)’ in Japanese. Japanese azuki beans are mostly cultivated in the Hokkaido area. The bigger variety of azuki beans is called Dainagon (大納言) and it is slightly more expensive than Azuki beans.

You can find azuki beans from Japanese grocery stores or health food stores.


2 Types of Anko (Sweet Red Bean Paste)

Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

There are two most common types of red bean paste:

  1. Tsubuan (粒あん) – The paste has a chunky texture with bean shapes still intact.
  2. Koshian (こしあん) – The paste has a fine, smooth texture.

How Do We Choose Which One to Use in Recipes? 

There’s no strict rule to this. Just like peanut butter, you can choose chunky versus smooth texture based on your preference. I personally prefer chunky beans in Japanese confectioneries and pastry, so I’d always make Tsubuan for Daifuku Mochi and Anpan,

How to Make Tsubu-an (Chunky Sweet Red Bean Paste)

Tsubuan (chunky red bean paste)

Tsubuan (粒あん) is prepared by boiling the azuki beans and sweetening with sugar. Bean skins are still left in the paste and the beans are not fully “mashed” although some of them are crushed or mashed during cooking.

I usually make Tsubuan because I prefer the texture and it’s also very easy to make!

How to Make Koshi-an (Fine Sweet Red Bean Paste)

Koshian (fine red bean paste)

Traditionally, Koshian (こしあん) requires more steps to prepare. After cooking the beans, you will have to:

  1. Pass the cooked azuki beans through a fine-mesh sieve to remove the bean skins. You may need to add water to help sift the beans through with the back of a wooden spoon.
  2. Put the mashed beans in a large bowl and fill up with water. Let the mashed beans settle naturally for 30 minutes, then discard the water. Repeat the same process, the second time for 15 minutes, and the third time for 5 minutes, until the water is clear.
  3. After you discard the water, transfer to a clean cotton cloth (or cheesecloth) to strain out most of the liquid. You will now have a fine, smooth paste.
  4. Transfer the bean paste to the pot and combine with sugar and salt. Reduce until thicker paste and Koshian is made!

That’s a lot of physical work!

So these days, the home cooks just turn on the food processor to make the fine paste, without removing the bean skins! Personally, I do not see a big difference in the Koshian between the traditional, time-consuming method and the food processor method.

In this recipe, I’ll show you the food processor method. You can use a blender too.

Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

5 Useful Tips for Making Anko At Home

1. No More Soaking Azuki Beans Overnight

In my previous recipe, I soaked the azuki beans in water overnight. I was taught by my grandma that azuki beans have very hard skin so it’s good to soak.

However, these days many articles and recipes mention that we do not need to soak azuki beans anymore. For the first 4 hours, azuki beans do not absorb any water and require 18 hours to soak. Therefore, it’s recommended to just start cooking right away.

I have been following the new method and I actually don’t see any difference from my previous recipe. Now I can make Anko when I want to make it and I do not need to wait overnight!

2. Boiling and Throwing Water Away

The reason why we boil the azuki beans and throw away the water is to remove the astringency (shibumi in Japanese 渋み) of the food. We use the same technique for cooking bamboo and bitter gourd.

I do it just once, while some people do it twice or three times. It’s up to you, but I’ve been doing just once and it’s okay with me.

3. The Bean to Sugar Ratio

In general, the bean to sugar ratio for Anko is 1 to 1, an equal amount. For home use, you can reduce the sugar to your liking.

However, before doing so, please note the followings:

  • The sugar is to preserve the paste for a longer time. If you reduce the sugar, Anko is not well-suited for keeping for a longer time.
  • Anko can be the only “sweet” element for the confectionary you’re making. The mochi, the dough, or the batter you’re preparing to go with Anko may not be sweetened.

In this recipe, for 200 grams of azuki beans, I suggested the sugar amount to be 175-200 grams of sugar 1: 0.9-1, which is slightly less than an equal amount.

4. Add A Pinch of Salt to Sweeten

You may wonder why salt when you are making sweet red bean paste.

A bit of salt is used as a flavor enhancer because it will reduce bitterness, but increase sweetness and umami which is desirable for sweet recipes. So instead of increasing the amount of sugar, add a pinch of salt to enhance the sweetness first.

5. Stop Cooking When You Can Draw a Line…

As soon as you can draw a line with a spatula on the bottom of the pot, transfer the red bean paste to a baking sheet or a flat wide-surface tray and cool immediately.

Remember the moisture will continue to evaporate with the remaining heat and the paste will thicken further as it cools.


How to Make Anko with a Pressure Cooker (Instant Pot)

Two bowls containing fine and chunky sweet red bean paste (anko).

If you own a pressure cooker such as an Instant Pot, it’s so much easier and faster to make red bean paste. Check out my Pressure Cooker Anko recipe for details.


White Bean Paste (Shiroan)

White bean paste on a Japanese black plate.

As mentioned earlier, sweet bean paste is not only made from azuki beans but also made from white beans. White Bean Paste, or what we call Shiroan (白餡), is another common filling for Japanese confectionery such as mochi and manju.

The paste has a milder bean taste, so it makes a great alternative to red bean paste if that’s what you prefer.

How to Store Anko

You can store the red bean paste in the freezer for up to 2 months! It’s such a treat to have it on hand, and more reasons to enjoy Japanese sweets for your afternoon tea.

Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

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Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

Sweet Red Bean Paste (Tsubuan and Koshian)

4.74 from 141 votes
Making Sweet Red Bean Paste (Anko) from scratch is easier than you think! You only need 4 ingredients for this recipe. I‘ll show you how to make tsubuan (chunky paste) and koshian (fine paste) so you can make delicious Japanese sweets at home.
Prep Time: 10 minutes
Cook Time: 1 hour 30 minutes
Total Time: 1 hour 40 minutes
Servings: 1 batch, 1.3 lb/600 g total (1 Tbsp = 20 g)

Ingredients
 
 

Japanese Ingredient Substitution: If you want substitutes for Japanese condiments and ingredients, click here.

Instructions
 

  • Gather all the ingredients.
    How to Make Anko Ingredients
  • Rinse 7 oz azuki beans and discard any broken beans. Drain.
    How to Make Anko Red Bean Paste 1
  • Transfer the drained azuki beans to a large pot. Add enough water to the pot to cover the beans by 1–2 inches.
    How to Make Anko Red Bean Paste 2
  • Place the pot on the stove and bring the water to a boil over medium-high heat.
    How to Make Anko Red Bean Paste 3
  • Once boiling, drain the beans in a fine-mesh sieve. Return the beans to the same pot.
    How to Make Anko Red Bean Paste 4
  • Next, add more water to the pot to cover the beans by 1–2 inches.
    How to Make Anko Red Bean Paste 5
  • Bring the water to a boil over medium-high heat. Once boiling, put an otoshibuta (drop lid) over the beans. (The otoshibuta will prevent the beans from dancing around too much.) Turn down the heat to medium low and keep it simmering for the next 1–1½ hours.
    How to Make Anko Red Bean Paste 6
  • Some of the water will evaporate, so add more water to keep the beans covered, as needed. After 1 hour, check if the beans are cooked. Pick up a bean and mash it with your fingers. When it mashes easily, it‘s done.
    How to Make Anko Red Bean Paste 7

To Make Tsubuan (Chunky Red Bean Paste)

  • Drain the cooked azuki beans in a sieve.
    How to Make Anko Red Bean Paste 8
  • Return the beans to the same pot. Turn the heat to medium low and add half of the ¾ cup sugar.
    How to Make Anko Red Bean Paste 9
  • Mix well. Once the sugar has dissolved, add the rest of the sugar.
    How to Make Anko Red Bean Paste 10
  • Mix well, stirring constantly. Then, add ½ tsp Diamond Crystal kosher salt and stir.
    How to Make Anko Red Bean Paste 11
  • If you plan to use the red beans for Zenzai (Oshiruko), you can use it right away. If you prefer a thicker version, reduce the soup further.
    Japanese lacquer bowls containing red bean soup with mochi.
  • Let the moisture evaporate. When you can draw a line on the bottom of the pot with your spatula, turn off the heat. Don‘t worry if it‘s still loose; the anko will continue to thicken as it cools. Transfer the anko to a flat baking sheet to let it cool completely. The tsubuan is now ready to use in a variety of Japanese sweets such as Daifuku MochiAnpanRed Bean Pancakes, and Matcha Zenzai (Red Bean Soup). Scroll down to see how to store it.
    How to Make Anko Red Bean Paste 12

To Make Koshian (Fine Red Bean Paste)

  • Reserve some of the cooking liquid. Then, drain the azuki beans in a sieve.
    How to Make Anko Red Bean Paste 8
  • Transfer the beans to a food processor. Run the food processor until the beans become a fine paste. If necessary, add 1–2 Tbsp cooking liquid to help process the beans.
    How to Make Anko Red Bean Paste 13
  • Transfer the fine paste back into the same cooking pot. Turn the heat to medium low and add half of the ¾ cup sugar.
    How to Make Anko Red Bean Paste 14
  • Mix well with the bean paste. Once the sugar has dissolved, add the rest of the sugar.
    How to Make Anko Red Bean Paste 15
  • Let the moisture evaporate, stirring constantly. Then, add ½ tsp Diamond Crystal kosher salt and stir.
    How to Make Anko Red Bean Paste 16
  • When you can draw a line on the bottom of the pot with your spatula, turn off the heat. Don‘t worry if it‘s still loose; the anko will continue to thicken as it cools. Transfer the anko to a flat baking sheet to let it cool completely. The koshian is now ready to use in a variety of Japanese sweets such as Strawberry Mochi (Ichigo Daifuku)Sakura MochiManju, and Mizu Yokan.
    How to Make Anko Red Bean Paste 17

To Store

  • Transfer the Anko to an airtight container, cool, and store in the refrigerator for up to 3–4 days or in the freezer for up to 2 months. You can also divide and wrap 100 g portions of the bean paste in plastic film and store in a freezer bag. When you’re ready to use it, defrost it in the refrigerator overnight. Tip: Compared to store-bought red bean paste, homemade anko uses less sugar and therefore doesn‘t keep as long.
    Koshian (fine red bean paste) and Tsubuan (chunky red bean paste).

Nutrition

Serving: 1 Tbsp · Calories: 45 kcal · Carbohydrates: 10 g · Protein: 1 g · Fat: 1 g · Saturated Fat: 1 g · Sodium: 19 mg · Potassium: 84 mg · Fiber: 1 g · Sugar: 6 g · Vitamin A: 1 IU · Calcium: 4 mg · Iron: 1 mg
Author: Namiko Hirasawa Chen
Course: Condiments, Dessert, How to
Cuisine: Japanese
Keyword: bean paste, sweet red bean
©JustOneCookbook.com Content and photographs are copyright protected. Sharing of this recipe is both encouraged and appreciated. Copying and/or pasting full recipes to any website or social media is strictly prohibited. Please view my photo use policy here.
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Make Delicious Recipes with Anko:

Sliced-in-half Strawberry Mochi (Ichigo Daifuku) on a white plate.

Editor’s Note: The post was originally published on March 12, 2012. The new images are added and the recipe instruction is slightly updated in March 2020.

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4.74 from 141 votes (119 ratings without comment)
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If I don’t want to use so much sugar, would it work with Eden brand Mirin?

Hi, Debbie! Thank you for trying Nami’s recipe.
You can use Mirin, but Eden brand Mirin contains salt, so you’ll need to adjust the amount for the right balance.
I hope this helps!

Just wanted to post in case its helpful to someone else – I halved this recipe to just make a small portion for the dessert I had in mind, also I cooked my adzuki beans, hands free, in my rice cooker (soaked over night, then added to my rice cooker with about double water) on the white rice setting for one cycle: done in way less time than on stove! Then just transfer to a pot and heat until sugar is dissolved, easy and quick!5 stars

Hi, Lisa! Thank you for sharing your experiences!
You may also make Anko in a pressure cooker. If you’re interested, here’s Nami’s recipe.🤗
https://www.justonecookbook.com/pressure-cooker-anko-red-bean-paste/

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