Authentic Janchi Guksu Recipe (Korean Noodle Soup)

Janchi guksu (잔치국수) is a classic Korean noodle soup made with thin wheat noodles served in a light, savory broth and topped with colorful vegetables, egg, seaweed, and a simple soy-based seasoning sauce.

The name literally means “banquet noodles,” reflecting the long Korean tradition of serving noodles at weddings, birthdays, and other celebrations.

Despite its festive name, janchi guksu is also one of Korea’s simplest and most comforting home-cooked meals. A good bowl depends on three things: a clean anchovy-kelp broth, properly cooked and thoroughly rinsed somyeon noodles, and fresh toppings that add texture and color.

Prep Time: 20 minutes
Cook Time: 25 minutes
Total Time: 45 minutes
Servings: 2–3

1. What Is Janchi Guksu?

Janchi guksu is a traditional Korean warm noodle soup made with very thin wheat noodles called somyeon (소면).

In Korean, janchi (잔치) means a feast or celebration, while guksu (국수) means noodles.

The noodles are typically served in a clear anchovy-based broth and topped with ingredients such as zucchini, carrot, egg strips, green onion, and roasted seaweed.

Some families also add seasoned kimchi, mushrooms, beef, or a spicy soy seasoning sauce.

Unlike ramyeon, janchi guksu does not rely on a strongly seasoned instant soup base. Its flavor is lighter and cleaner, allowing the broth, noodles, and fresh toppings to remain distinct.

2. Korean Kitchen Note

The word “janchi” tells you a lot about the history of this dish.

Long, thin noodles traditionally symbolize longevity in Korean culture. Because the strands remain long and unbroken, noodles came to represent wishes for a long life and, particularly at weddings, a long-lasting marriage.

That is why noodle dishes became closely associated with weddings and other celebratory gatherings.

Older generations in Korea sometimes even used expressions about “when someone will eat noodles” as an indirect way of asking when that person would get married.

Today, janchi guksu is no longer reserved for formal celebrations. It is an everyday comfort food sold in casual Korean restaurants, traditional markets, and home kitchens.

For many Koreans, a steaming bowl of light anchovy broth and soft noodles feels simple, familiar, and deeply comforting.

3. Ingredients

For 2–3 servings:

For the Anchovy-Kelp Broth

• 7 cups (about 1.65 liters) water
• 8–10 large dried Korean anchovies, heads and guts removed
• 1 piece dried kelp (dashima), about 3 x 3 inches
• 100 g (3.5 oz) Korean radish or daikon, sliced
• 1/2 medium onion
• 1 green onion
• 1 tablespoon Korean soup soy sauce (gukganjang)
• Salt, to taste

For the Noodles

• 200 g (7 oz) somyeon, thin Korean wheat noodles

For the Toppings

• 1/2 small zucchini, julienned
• 1/3 small carrot, julienned
• 2 eggs
• 1 sheet roasted gim, thinly sliced or crushed
• 1 green onion, finely sliced
• 1 teaspoon neutral cooking oil
• Pinch of salt

Optional Seasoning Sauce

• 2 tablespoons soy sauce
• 1 tablespoon finely chopped green onion
• 1/2 teaspoon minced garlic
• 1 teaspoon toasted sesame oil
• 1 teaspoon toasted sesame seeds
• 1/2 teaspoon gochugaru, optional

4. Global Ingredient Substitution Guide

Somyeon

Somyeon are very thin Korean wheat noodles that cook in only a few minutes.

If Korean somyeon is unavailable, Japanese somen is the closest and easiest substitute.

Do not substitute thick udon or chewy Korean kalguksu noodles if you want the traditional texture. The delicacy of thin noodles is an important part of janchi guksu.

Dried Korean Anchovies

Korean dried anchovies, called myeolchi (멸치), are commonly used to make soup broth.

For broth, choose larger anchovies rather than tiny anchovies used for stir-fried side dishes.

If they are unavailable, Korean anchovy stock packets are a convenient substitute.

Dashima

Dashima is Korean dried kelp and is closely related to Japanese kombu.

Japanese kombu can therefore be used as a straightforward substitute.

Korean Radish

Korean radish adds mild sweetness and depth to the broth.

Daikon works well if Korean radish is unavailable.

Gukganjang

Korean soup soy sauce provides savory flavor without darkening the broth too much.

If you cannot find it, use a smaller amount of regular soy sauce and adjust the final seasoning with salt.

5. Step-by-Step: How to Make Janchi Guksu

Step 1. Make the Anchovy-Kelp Broth

Place the water, dried anchovies, kelp, Korean radish, onion, and green onion in a medium pot.

Bring to a gentle boil over medium heat.

After about 10 minutes, remove the kelp so that prolonged cooking does not give the broth an overly strong seaweed flavor.

Continue simmering the remaining ingredients for another 15 to 20 minutes.

Strain the broth and discard the solids.

Season the clear broth with soup soy sauce and salt. Keep it hot over low heat.

Step 2. Prepare the Vegetable Toppings

Heat a small amount of neutral oil in a skillet over medium heat.

Sauté the julienned zucchini briefly with a tiny pinch of salt until just tender.

Remove it from the pan and repeat with the carrot.

Do not overcook the vegetables. They should keep their color and a little texture.

Step 3. Make the Egg Garnish

Beat the eggs with a small pinch of salt.

Lightly oil a nonstick pan and pour in a thin layer of egg.

Cook gently until set, flip if needed, and transfer to a cutting board.

Once cool enough to handle, slice the egg into thin strips.

Step 4. Make the Optional Seasoning Sauce

Combine soy sauce, chopped green onion, garlic, sesame oil, sesame seeds, and gochugaru if using.

Set the sauce on the table so each person can adjust the flavor and spice level of their own bowl.

Step 5. Cook the Somyeon

Bring a large pot of water to a rolling boil.

Add the somyeon and immediately stir to prevent the thin noodles from sticking together.

Cook according to the package directions, usually about 3 to 4 minutes.

When the water begins to foam aggressively, adding a small splash of cold water can help control the boil while the noodles finish cooking.

Step 6. Rinse the Noodles Thoroughly

Drain the cooked noodles immediately.

Rinse them thoroughly under cold running water, gently rubbing the noodles between your hands.

This removes excess surface starch and stops the cooking process.

Drain very well.

Step 7. Warm the Noodles

Because the rinsed noodles are now cold, place one portion in a serving bowl and ladle a little hot broth over them.

Carefully pour the broth back into the pot while keeping the noodles in the bowl.

Repeat once if necessary.

This traditional technique warms the noodles without cooking them further.

Step 8. Assemble the Janchi Guksu

Divide the noodles among serving bowls.

Ladle plenty of hot anchovy broth over the noodles.

Arrange the zucchini, carrot, egg strips, sliced green onions, and gim neatly on top.

Serve immediately with the seasoning sauce on the side.

6. Korean Cook's Tips

Do not overcook somyeon. These noodles are extremely thin and can become soft quickly.

Rinse the noodles very well. This is one of the most important steps. Removing excess starch keeps the noodles smooth and prevents the broth from becoming cloudy and starchy.

Keep the broth hot until serving. The noodles are rinsed in cold water, so lukewarm broth can result in a disappointing bowl.

Do not overload the broth with soy sauce. Janchi guksu should have a light, clean broth rather than a dark soy flavor.

Prepare everything before boiling the noodles. Once somyeon is cooked, the dish should be assembled and served quickly.

Toppings are flexible. Zucchini and egg are traditional choices, but kimchi, mushrooms, seasoned beef, or yubu can also be added.

7. Nutrition Notes

Janchi guksu is primarily a carbohydrate-based meal because wheat noodles make up the largest portion of the dish.

Egg provides protein and fat, while zucchini, carrot, green onion, radish, and optional vegetable toppings add small amounts of fiber, vitamins, and minerals.

The anchovy broth contributes savory flavor without requiring a large amount of added fat.

However, sodium can increase depending on how much soup soy sauce, regular soy sauce, and seasoning sauce are used.

If you want to reduce sodium, keep the broth lightly seasoned and add only a small amount of yangnyeom sauce to the finished bowl.

For a more substantial meal, janchi guksu can be served with additional protein-rich toppings such as egg, tofu, or a small amount of cooked beef.

8. Why It Works: Cooking Science

Why Combine Anchovies and Kelp?

Dried anchovies and kelp contribute different savory compounds to the broth.

Using them together creates greater depth than relying on plain salted water while still keeping the broth relatively light.

Why Remove Kelp Before Long Boiling?

Kelp releases flavor into water relatively quickly.

Removing it before prolonged boiling helps maintain a clean-tasting broth and avoids an overly strong seaweed character.

Why Rinse Cooked Somyeon in Cold Water?

Cooking releases starch from the surface of wheat noodles.

Cold-water rinsing removes much of this loose starch and quickly cools the noodles, slowing further cooking.

The result is a cleaner broth and noodles with a more pleasant, springy texture.

Why Warm the Noodles With Broth Before Serving?

Cold-rinsed noodles can reduce the temperature of the finished soup dramatically.

Briefly bathing them in hot broth warms the noodles without continuing to boil them and risking overcooking.

9. What to Serve With Janchi Guksu

Janchi guksu is often eaten as a simple one-bowl meal, so it does not require an elaborate selection of side dishes.

The most natural accompaniment is kimchi.

Good pairings include:

• Baechu kimchi – Napa cabbage kimchi
• Kkakdugi – Radish kimchi
• Oi muchim – Spicy Korean cucumber salad
• Gyeran mari – Korean rolled omelet
• Simple vegetable banchan

Because the noodle soup itself is mild, a spicy or fermented side dish provides an especially good contrast.

10. Frequently Asked Questions

What does janchi guksu mean?

“Janchi” means feast or celebration and “guksu” means noodles. The dish is therefore often translated as Korean banquet noodles or feast noodles.

Why is janchi guksu served at Korean weddings?

Long noodles traditionally symbolize longevity and long-lasting relationships. Serving noodles at weddings became associated with wishing the couple a long and happy marriage.

What noodles are used for janchi guksu?

Traditional janchi guksu uses somyeon, very thin Korean wheat noodles. Japanese somen is an excellent substitute.

Is janchi guksu spicy?

The basic noodle soup itself is mild. A spicy seasoning sauce containing gochugaru can be added separately, allowing each diner to choose the desired heat level.

Can I make janchi guksu without anchovies?

Yes. A vegetarian broth can be made with dried kelp, dried shiitake mushrooms, Korean radish, and onion. Beef broth is another traditional-style alternative.

Why do you rinse Korean noodles after cooking?

Rinsing removes loose surface starch and stops residual cooking. This helps keep somyeon from becoming overly soft and keeps the finished broth clear.

Can I make the broth ahead of time?

Yes. The anchovy broth can be prepared ahead and refrigerated. Reheat it until very hot immediately before cooking and assembling the noodles.

Can I prepare the noodles ahead?

It is better not to. Somyeon has the best texture when cooked, rinsed, and served shortly afterward.

11. More Korean Recipes

If you enjoy comforting Korean noodle dishes and soups, try these next:

• Miyeokguk – Korean Seaweed Soup
• Yukgaejang – Korean Spicy Beef Soup
• Galbitang – Korean Beef Short Rib Soup
• Kongnamul Gukbap – Korean Soybean Sprout Soup with Rice
• Sundubu Jjigae – Korean Soft Tofu Stew
• Kimchi Jjigae – Korean Kimchi Stew

12. Key Takeaways

Authentic janchi guksu is a simple Korean noodle soup built around thin somyeon noodles, a clean savory broth, and fresh colorful toppings.

The most important techniques are to make a flavorful but light anchovy-kelp broth, avoid overcooking the noodles, rinse the somyeon thoroughly in cold water, and assemble the dish immediately before eating.

Its name also tells an important piece of Korean food history. Long noodles became associated with wishes for longevity and lasting relationships, which is why guksu has traditionally appeared at weddings and other celebrations.

Today, janchi guksu is just as comfortable at an ordinary Korean lunch table: a warm, inexpensive, satisfying bowl of noodles that can be made with ingredients found in almost any Korean kitchen.