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Kong Jaban (Korean Sweet Black Beans)

This classic Korean side dish, known as Kongjaban, offers a delightful balance of salty-sweet flavours and a satisfyingly chewy texture. These glossy black beans are a staple of the traditional banchan spread, providing a nutritious and protein-rich accompaniment to any meal. Slowly simmered in a mixture of soy sauce and dashi, the beans develop a deep umami profile that is beautifully enhanced by the nutty aroma of toasted sesame oil and seeds.

As a versatile vegan dish, these sweet black beans are ideal for meal prep, as they keep perfectly in the refrigerator for up to two weeks. The contrast between the chilled, savoury beans and a bowl of steaming hot jasmine rice makes for a simple yet comforting lunch. This healthy, homemade snack is also a fantastic way to introduce authentic Korean flavours into your weekly cooking routine.

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Ingredients for Kong Jaban (Korean Sweet Black Beans)

  • 300ml dried black beans, rinsed and picked over

  • 1.9L dashi or water, plus more if needed

  • 240ml soy sauce

  • 180ml sugar

  • 2 tablespoons toasted sesame oil

  • 1 tablespoon toasted sesame seeds

Soak the beans in enough water to cover them by 3 inches in a covered container in the refrigerator for 8 to 12 hours.

Drain the beans, put them in a pot, and add the dashi or water and soy sauce. Set over medium-high heat and bring the liquid to a simmer. Adjust the heat to maintain a gentle simmer and cook for 1 hour, stirring the beans on a regular basis. The level of liquid will reduce as the beans cook; once it gets to the point where it does not completely cover the beans, you will need to stir more often to ensure that the beans cook evenly. After an hour, the beans should be tender but still retain a little bite. If they are still hard, add more dashi or water and cook for 15 to 20 minutes longer, until the beans are tender with a little bite.

Add the sugar, sesame oil, and sesame seeds to the pot and mix well. (It’s important to wait to add the sugar until the beans are tender, as adding it in the beginning will cause the beans to harden when refrigerated.) Let the beans cool slightly, then transfer to an airtight container and refrigerate until chilled. (The beans will keep for up to 2 weeks in the refrigerator.)

Serve the beans cold with hot rice.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

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Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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