Quick and Easy Japchae

*Recipe last updated on 7 January 2024. It’s updated to get you a more full-flavoured Japchae while being efficient, WITHOUT much additional time or effort added!

Japchae is one of those Korean dishes that everyone loves: chewy sweet potato glass noodles tossed with colourful vegetables, savoury meat, and a deliciously nutty soy-sesame sweet sauce.

But traditional japchae can be surprisingly time-consuming to make. You would think it’s simply a stir fry… but nope!

First you blanch the noodles, then toss it in its own soy sauce and sesame oil blend so the noodles can soak up all of the seasoning. Then you individually cook and season each component of the the Japchae. Those toppings are added to the noodles, and a final seasoning sauce is poured over to bring everything together. The sauce cannot be too much, or too salty. Are you still with me? You are? Oh wow. Anyway. Combine everything together, and then we have a perfect plate of Japchae. The final plate should present you with chewy, seasoned noodles, and flavour in every bite.

The result is delicious, but it’s a lot of work for one noodle dish!

To be perfectly honest… I don’t always have the time—or patience—for that… especially not on a weeknight!

So this is my easier, weeknight-friendly way to make japchae. You still get those chewy, flavour-packed noodles and all the colourful toppings you love, but with a simpler cooking process and less time spent juggling a dozen separate steps in the kitchen.

It’s the kind of japchae I make when I’m craving the real thing, but want to keep cooking as effortless as possible.

What is Japchae?

Japchae (잡채) is a popular Korean noodle dish made with chewy sweet potato glass noodles, known as dangmyeon. The noodles are tossed with colourful vegetables, meat, and a savoury-sweet sauce made with soy sauce and sesame oil.

Japchae is traditionally served as a side dish (banchan), but it’s hearty enough to enjoy as a main meal too.

Key Ingredients for Japchae

Sweet Potato Glass Noodles (Dangmyeon)

The star of japchae! These Korean sweet potato starch noodles are thin, chewy, and wonderfully absorbent, making them perfect for soaking up the savoury-sweet sauce.

For the best japchae, I highly recommend using dangmyeon—the chewy texture is what makes the dish. Look for them in Korean or Asian grocery stores.

Vegetables

Japchae is all about the colourful mix of vegetables. Typical choices include:

• Carrots
• Spinach
• Bell peppers
• Mushrooms

Feel free to switch these up based on what you have in your fridge. Slice your vegetables into thin strips so you can pick up a little bit of everything in each bite.

Protein

• Thinly sliced beef, especially shabu-shabu-style beef, is my go-to because it cooks quickly and stays tender.

• Eggs are a must for me! Thin, chewy, savoury strips of omelette add another layer of texture and flavour to the japchae, and make it feel extra hearty.

• You can also use chicken or tofu, or skip the protein altogether for a vegetarian japchae.

Seasoning

• Soy Sauce & Sesame Oil: The foundation of japchae’s savoury, nutty flavour. Soy sauce seasons the noodles, while sesame oil adds that unmistakable toasted aroma and richness.

• Brown Sugar & Honey: Japchae has a delicious sweet-savoury balance. Typically that touch of sweetness comes from sugar and mirin (a sweet rice wine), but I prefer to use a combination of brown sugar and honey for a deeper, slightly caramelised sweetness, but you can use just either one. Regular sugar will also work if that’s all you have.

• Sesame Seeds: A final sprinkle of roasted sesame seeds adds a little crunch and extra nuttiness. They’re optional, but highly recommended!

How to Make Easy Japchae

1. Cook the Japchae Noodles

• Bring a large pot of water to a boil. Add the dangmyeon (sweet potato glass noodles) and cook until softened, translucent, and al dente. Cooking time can vary by brand, so check the package instructions. Mine took about 5 minutes.

• Drain the noodles, then rinse briefly under cold water or dunk them in an ice bath for about 5 seconds to stop the cooking process and prevent them from becoming soggy.

• Transfer the noodles to a large mixing bowl, drizzle with a little of the seasoning sauce, and toss to coat. The warm noodles will quickly absorb the flavours.

2. Make the Seasoning Sauce

• While the noodles are cooking, combine the soy sauce, sesame oil, sugar, honey, and oyster sauce in a small bowl. Add 1–2 tablespoons of hot water and stir until the sugar dissolves.

• Give it a quick taste—it should be savoury-sweet with a delicious nuttiness from the sesame oil.

• The shortcut: This one sauce is used to season the noodles, vegetables, and the rest of the dish, so there’s no need to make separate marinades or seasonings for each ingredient.

3. Cook the Omelette

• If using the same pan, simply wipe it clean with a paper towel or kitchen towel. No need to wash it!

• Beat the eggs in a bowl. For an extra vibrant yellow colour, you can add a small pinch of turmeric powder.

• Heat a little oil in the pan over medium heat. Pour in the eggs and spread them into a thin layer. Cook until set, flipping once if needed.

• Remove from the pan and let cool slightly. Roll the omelette up and slice it into thin strips. You can also use kitchen scissors to cut the omelette directly into the mixing bowl.

4. Stir Fry the Vegetables

• In the same pan, add a little more oil if needed. Sauté the onions and garlic until fragrant, then add your vegetables.

• Add about 1 tablespoon of the seasoning sauce and stir-fry until the vegetables are cooked to your liking and the leafy greens have wilted.

• I use carrots, bean sprouts, and Chinese lettuce, but you can easily switch these up. For crunchier carrots, add everything at the same time. If you prefer them softer, stir-fry the carrots first before adding the remaining vegetables.

• Transfer the cooked vegetables to the mixing bowl with the noodles.

5. Cook the Beef

• Add a little more oil to the same pan if needed, then cook the thinly sliced beef. As it cooks, scrape up any browned bits left in the pan—these add extra flavour to the beef.

• Season with salt and pepper. Alternatively you can also use a teaspoon of the seasoning sauce, but I like doing a basic salt and pepper to let the beefy flavours shine through.

• Once cooked, transfer the beef to the mixing bowl.

6. Toss Everything Together

• By now, you should have the noodles, omelette strips, vegetables, and beef in the mixing bowl.

• Pour over the remaining seasoning sauce and sprinkle with sesame seeds. Toss everything together until the noodles and toppings are evenly coated.

• Taste and adjust the seasoning as needed. Add a little more sauce if you prefer a stronger flavour.

• Serve immediately and enjoy!

How to Serve Japchae

Japchae is delicious served warm or at room temperature, making it a versatile dish for both everyday meals and gatherings.

• As a main dish: Serve a generous bowl of japchae on its own for a satisfying noodle meal.

• As a side dish: Serve smaller portions alongside steamed rice and your favourite Korean dishes for a delicious Korean-style spread.

• For hosting or gatherings: Japchae is a popular choice for potlucks, parties, and celebrations because it can be made ahead and served warm or at room temperature.

For the best flavour and texture, I recommend serving japchae freshly tossed and topped with a sprinkle of toasted sesame seeds.

Storing and Reheating

How to Store

Store leftover japchae in an airtight container in the refrigerator for up to 3–4 days.

The noodles will firm up as they chill, but they’ll soften again when reheated.

How to ReheaT

Stovetop:
My preferred method! Add the japchae to a pan with a small splash of water and gently toss over medium-low heat until warmed through.

Add a tiny drizzle of sesame oil at the end to freshen up the flavours.

Microwave:
Place the japchae in a microwave-safe bowl and add a small splash of water.

Cover loosely and microwave in short intervals, stirring between each, until heated through.

TIP: Japchae is best enjoyed fresh, but if you’re making it ahead to meal prep or to host, you can gently reheat it on the stovetop just before serving. Add a splash of water as needed to loosen the noodles.