← BlogJune 28, 2026

How to Make the Perfect Japchae Korean Glass Noodles

Korean · Medium · 40 min · 4 servings

Dairy-Free
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Japchae Korean Glass Noodles

Japchae is a festive Korean stir-fried noodle dish made with chewy sweet potato glass noodles, colorful vegetables, and seasoned beef. It is a staple at Korean celebrations and holidays, offering a satisfying combination of textures and flavors.

Why this recipe works

This Japchae Korean Glass Noodles recipe has been crafted to deliver restaurant-quality results in your home kitchen. At just 40 minutes from start to finish, it fits perfectly into a busy schedule without sacrificing flavor. Each serving comes in at 380 calories with 18g of protein, making it a balanced choice for any meal.

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What you will need

This recipe uses 6 simple ingredients that you can find at any grocery store:

  • 200 g sweet potato glass noodles
  • 200 g thinly sliced beef sirloin
  • 1 medium sliced yellow onion
  • 2 cups fresh spinach
  • 3 tbsp soy sauce
  • 2 tbsp sesame oil

Step by step instructions

Step 1: Cook the Noodles

Boil the sweet potato glass noodles in a large pot of water for 6 to 8 minutes until tender but still chewy. Drain and rinse under cold water, then toss with a tablespoon of sesame oil to prevent sticking.

Step 2: Prepare the Beef and Vegetables

Season the sliced beef with one tablespoon of soy sauce and set aside. Blanch the spinach in boiling water for 30 seconds, drain, squeeze out excess water, and season with a small pinch of salt and sesame oil.

Step 3: Stir-Fry Everything

In a large wok or skillet over medium-high heat, cook the beef until browned. Add the sliced onion and stir-fry for 2 minutes. Add the noodles and remaining soy sauce, tossing everything together for 3 to 4 minutes until well combined.

Step 4: Combine and Serve

Add the blanched spinach to the wok and toss gently to incorporate. Drizzle with remaining sesame oil, sprinkle with sesame seeds, and serve warm or at room temperature as a side or main dish.

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Easy substitutions

Missing an ingredient? Here are some swaps that work perfectly:

  • beef sirloin → Firm tofu or mushrooms make an excellent vegetarian substitute
  • sweet potato glass noodles → Rice noodles can be used but will change the chewy texture

Common mistakes to avoid

Watch out for these pitfalls that can affect your results:

  • Overcooking the glass noodles makes them mushy and causes them to break apart
  • Not seasoning each component separately leads to uneven flavor throughout the dish

Nutrition facts

Per serving: 380 calories, 18g protein, 52g carbs, 12g fat, 3g fiber.

Ready to cook?

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