Korean Soy-Braised Black Beans

Quick answer

Total time: 515 min
Level: Medium
Servings: 4 servings
Ingredients: 8

About this dish

Kongjaban is a traditional Korean side dish of black soybeans slowly braised over low heat in a seasoning liquid of soy sauce, sugar, and corn syrup until the liquid reduces completely and the beans are glossy and lacquered.

Starting with enough braising liquid is essential: the beans need time to absorb the seasoning gradually before the moisture evaporates, and rushing the heat causes scorching before the interiors have softened. As the liquid reduces, the sugars caramelize against the exterior of each bean, building the glossy dark coating that makes kongjaban recognizable on any Korean table. The soy sauce and sugar create a sweet-salty interplay that is quietly addictive, and sesame oil added at the very end contributes a nutty aroma that lingers. Soaking the dried beans overnight before boiling ensures a tender interior without losing the structural integrity that prevents them from turning to mush during the braise. Corn syrup keeps the exterior pliable and shiny even after the dish cools and is stored. Refrigerated in a clean container, kongjaban keeps for more than two weeks, which explains why it is one of the most consistently prepared staple side dishes in Korean households.

Ingredients

servings

IngredientAmountUnit

black soybeans180 gg

water700 mlml

soy sauce3 tbsptbsp

dark brown sugar1½ tbsptbsp

corn syrup1½ tbsptbsp

kelp1 piecepiece

sesame oil1 tsptsp

sesame seeds1 tsptsp

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Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

6 steps

1

Control

Sort 180 g black soybeans, removing cracked beans or debris, then rinse until the water runs mostly clear.

Cover with plenty of water and soak for at least 8 hours so the centers hydrate fully.
2

Control

Drain the soaked beans and place them in a pot with 700 ml water and 1 piece of kelp.

Bring to a gentle simmer over medium-low heat, keeping the bubbles small to prevent splitting.
3

Control

Simmer for about 20 minutes with the lid slightly ajar so the beans soften before seasoning.

Press one bean between your fingers; if a hard center remains, cook a little longer before adding soy sauce.
4

Season

Remove the kelp, then stir in 3 tbsp soy sauce and 1.5 tbsp dark brown sugar.

Lower the heat and braise for about 10 minutes, stirring occasionally so the sugar does not catch on the pot.
5

Control

When the beans are tender and only a shallow layer of liquid remains, add 1.5 tbsp corn syrup.

Stir and reduce for 3-4 minutes until the beans look glossy and the sauce lightly coats them.
6

Step

Turn off the heat and fold in 1 tsp sesame oil and 1 tsp sesame seeds with the residual heat.

Cool completely before sealing in a clean container, which helps keep the beans glossy in the refrigerator.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: Kongjaban-jorim softens black soybeans in kombu stock before braising for a tender, glossy finish.
Finish cue: Cool completely before sealing in a clean container, which helps keep the beans glossy in the refrigerator.
Storage and reheating: Cooling fully before refrigerating helps maintain a glossy finish.