Korean Roasted Chestnuts
Quick answer
Gunbam is Korean roasted chestnuts, a seasonal street food sold from carts across Korea from late autumn through early spring.
What makes this special
- Scoring an X-shaped cut into chestnut shells allows steam to escape during roasting at 210 degrees Celsius, producing smoky and sweet seasonal street food.
- X-scored shell vents steam and prevents explosive cracking
- 210°C for 20-25 min converts starch to sugar for nutty aroma
Key ingredients
Core cooking flow
- 1 Soak 500 g raw chestnuts in 600 ml water mixed with 1 tablespoon salt for 20 minutes.
- 2 Drain the chestnuts in a strainer and dry them with a clean cloth.
- 3 Place each chestnut rounded side up and score an X almost to the inner skin.
Gunbam is Korean roasted chestnuts, a seasonal street food sold from carts across Korea from late autumn through early spring. An X-shaped cut is scored through the shell of each chestnut before roasting. This cut serves a structural purpose: it creates a vent for steam to escape during cooking, preventing the shell from cracking unpredictably. Roasting at 210 degrees Celsius for 20 to 25 minutes converts the starches inside to sugars, deepening the sweetness and building a toasty, nutty flavor that plain raw chestnut does not have. Soaking the chestnuts in salted water for 20 to 30 minutes before roasting cleans any debris from the surface and imparts a faint background seasoning. Wrapping the freshly roasted batch in a dry cloth for five minutes while they rest lets residual steam work between the outer shell and the thin inner skin, making the inner skin easier to peel. The chestnuts should be eaten hot, while the flesh is still floury and crumbles gently against the tooth. Tossed with a little butter and sugar while warm, they take on a sheen and extra sweetness that amplifies their fragrance.
Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Season
Soak 500 g raw chestnuts in 600 ml water mixed with 1 tablespoon salt for 20 minutes.
Skim off any floating debris, then rub the shells under running water until the surface feels clean.
- 2Prep
Drain the chestnuts in a strainer and dry them with a clean cloth.
Do this before scoring because wet shells slip easily, making the X cut uneven and harder to control.
- 3Prep
Place each chestnut rounded side up and score an X almost to the inner skin.
If the cut is too shallow the shell will not open, while a very deep cut can split the flesh.
- 4Heat
Toss the scored chestnuts with 1 teaspoon cooking oil until lightly coated.
Preheat the oven fully to 210°C, then spread the chestnuts in one layer on a pan with the cuts facing up.
- 5Finish
Roast for 20 to 25 minutes, until the X opens into a V shape and the shells turn brown.
Start checking smaller chestnuts at 20 minutes so they do not dry out before the larger ones finish.
- 6Finish
Wrap the hot chestnuts in a dry cloth for 5 minutes so residual steam loosens the inner skin.
While still warm, toss with 1 tablespoon butter and 1 tablespoon sugar, then serve before the texture firms.
After the steps
Pick a recipe that fits this dish.
Continue with shared ingredients, meal pairings, or a similar method.
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