Japchae is a beloved Korean stir-fry featuring chewy sweet potato glass noodles tossed with colorful vegetables, tender beef, and a glossy soy-sesame sauce. This classic version balances savory, sweet, and nutty flavors in every glossy, slurpable bite, making it a staple at celebrations and family dinners alike.
Prep Time20 mins
Cook Time20 mins
Total Time40 mins
Servings4
Yield4 servings
Nutrition Facts
Per serving (estimated)
- 480 kcalCalories
- 16 gFat
- 4 gSaturated Fat
- 65 gCarbs
- 4 gFiber
- 9 gSugar
- 22 gProtein
- 780 mgSodium
- 620 mgPotassium
- 95 mgCalcium
- 4 mgIron
- 18 mgVitamin C
- 280 mcgVitamin A
Ingredients
For the noodles and beef
- 8 oz sweet potato glass noodles (dangmyeon)
- 6 oz beef sirloin, thinly sliced
- 2 tablespoons soy sauce
- 1 tablespoon sugar
- 1 tablespoon toasted sesame oil
- 2 cloves garlic, minced
- 1/2 teaspoon freshly ground black pepper
For the vegetables
- 5 oz fresh spinach
- 1 medium carrot, julienned
- 1 small yellow onion, thinly sliced
- 6 fresh shiitake mushrooms, stemmed and sliced
- 1/2 red bell pepper, julienned
- 2 scallions, cut into 2-inch lengths
For the seasoning and garnish
- 3 tablespoons soy sauce
- 2 tablespoons sugar
- 2 tablespoons toasted sesame oil
- 1 tablespoon neutral cooking oil
- 1 tablespoon toasted sesame seeds
- Pinch of salt for blanching spinach
Directions
- Bring a large pot of water to a boil. Add the sweet potato glass noodles and cook for 6 to 7 minutes until tender but still chewy, then drain and rinse under cold water. Toss the drained noodles with 1 tablespoon of sesame oil to prevent sticking.
- Meanwhile, marinate the sliced beef with 2 tablespoons soy sauce, 1 tablespoon sugar, 1 tablespoon sesame oil, garlic, and black pepper for 10 minutes while you prep the vegetables.
- Blanch the spinach in boiling salted water for 30 seconds, then immediately transfer to an ice bath. Squeeze out excess water, chop into 2-inch pieces, and set aside.
- Heat 1 tablespoon of neutral oil in a large skillet or wok over medium-high heat. Stir-fry the beef until just cooked through, about 2 minutes, then transfer to a large mixing bowl.
- In the same pan, stir-fry the onion, carrot, bell pepper, and shiitake mushrooms separately or together for 2 to 3 minutes until crisp-tender, seasoning lightly with salt. Add each batch to the mixing bowl with the beef.
- Add the cooked noodles to the mixing bowl along with the blanched spinach and scallions. Pour the combined seasoning of 3 tablespoons soy sauce, 2 tablespoons sugar, and 2 tablespoons sesame oil over everything.
- Using tongs or your hands, gently toss and massage the noodles until evenly coated and glossy, about 1 to 2 minutes, warming everything through.
- Transfer to a serving platter, sprinkle generously with toasted sesame seeds, and serve warm or at room temperature.
- Enjoy as a main dish with rice or as a banchan alongside other Korean favorites.
Cook’s Notes
- Do not overcook the glass noodles; they should remain pleasantly chewy since they continue to soften when tossed with hot vegetables.
- For a vegetarian version, omit the beef and add extra shiitake or wood ear mushrooms for umami depth.
- Use kitchen shears to cut the long noodles into shorter, easier-to-eat lengths before tossing.
- Toasting the sesame seeds briefly in a dry pan before garnishing boosts their nutty aroma significantly.
- Japchae tastes even better the next day once the noodles have fully absorbed the seasoning, making it ideal for meal prep.










