Leeks with Udon Dish is a quick, soothing Japanese noodle soup with tender chicken, silky udon, and a light dashi broth that feels comforting without being heavy. It is beginner-friendly, weeknight-ready, and especially good when you want a warm bowl fast.

This is the kind of meal you make when you want something cozy but not complicated. The broth comes together in minutes, the chicken cooks right in the pot, and the leek softens just enough to turn sweet and mellow.
What makes this bowl so satisfying is the balance. You get savory depth from dashi and soy sauce, a little sweetness from mirin and sugar, and that soft, chewy udon texture that makes each bite feel especially comforting.
It also works beautifully as a solo lunch or a simple dinner. Because the ingredient list is short, each part matters, and that is exactly why the finished soup tastes so clean, warm, and dependable.
Leeks with Udon Dish Ingredients
- Dashi stock gives the soup its delicate savory base and that unmistakable Japanese noodle-soup character.
- Soy sauce seasons the broth with salt and depth without making it too strong or dark.
- Mirin adds a gentle sweetness and a rounded finish that keeps the broth from tasting flat.
- Sugar helps balance the saltiness and supports the mild sweetness of the leek.
- Sake adds light aroma and helps the broth taste a little more layered and polished.
- Chicken thigh stays tender and juicy in the broth, making the bowl feel heartier and more complete than a broth-only noodle soup.
- Udon noodles bring that signature thick, springy texture that turns a simple soup into a satisfying main meal.
- Leek softens into the broth and adds sweetness, a subtle onion note, and a lovely silky texture.
- Green onion finishes the bowl with a fresh, sharp bite right before serving.

Cooking Steps
STEP 1: Set a saucepan over medium heat and pour in the prepared dashi stock. Add the soy sauce, mirin, and sugar, then bring everything to a gentle boil. Let it bubble for a couple of minutes so the broth tastes blended rather than separate.
STEP 2: Stir in the sake, then add the sliced leek and bite-size chicken pieces. Keep the broth at a lively simmer and stir gently once or twice so the chicken cooks evenly and the leek slips into the broth without breaking apart too much.
STEP 3: Let the soup cook for several minutes, just until the chicken is fully cooked and the leek turns tender. You are looking for chicken that is no longer pink and leek that is soft but not falling apart.
STEP 4: While the broth simmers, cook the udon according to the package directions. Fresh-frozen udon usually cooks quickly, so it can go in near the end. Dried udon needs a little more time, so start it earlier to keep both parts ready together.
STEP 5: Drain the noodles well and transfer them to a serving bowl. This keeps the texture springy and prevents the broth from becoming diluted by excess cooking water.
STEP 6: Ladle the hot broth over the noodles, making sure the chicken and leek are evenly distributed in the bowl. Scatter the sliced green onion over the top and serve immediately while the noodles are hot and the broth is at its most fragrant.
Perfect Pairings
Because this bowl is light and brothy, it pairs nicely with simple sides that do not compete with it. A small plate of cucumber salad adds freshness and crunch, especially if the soup is part of lunch.
Steamed or sautéed greens also work well. Something mild like spinach or bok choy fits the gentle flavor of the broth and keeps the meal balanced without making it feel too heavy.
For a slightly fuller spread, serve it with a small piece of tamagoyaki or a simple rice ball. That keeps the meal in the same comforting, home-style direction while still letting the udon remain the star.
Can I use dried udon instead of fresh-frozen?
Yes, dried udon works well here. The main thing is timing. Start dried noodles early enough so they finish right around the time the broth is ready, then drain them well before adding the soup.
What can I use instead of sake?
You can leave it out if needed. The broth will still taste good, though a little less rounded. A small splash of extra dashi or a tiny bit more mirin can help soften that gap without changing the character too much.
Can I make this ahead of time?
This soup is best right after cooking, especially for the udon texture. For partial prep, you can make the broth with chicken and leek ahead, then cook fresh noodles when you are ready to serve.

Can I add more vegetables?
Yes, but keep them gentle so the broth stays delicate. Mushrooms, baby spinach, or a little bok choy are good choices. Add just enough to support the bowl without turning it into a crowded mixed-vegetable soup.
Helpful Tips
- Slice the leek evenly so it softens at the same pace and blends nicely into the broth.
- Do not overcook the chicken. Small thigh pieces stay tender when simmered just until done.
- Cook the udon separately and add it at the end so the broth keeps its clean flavor and the noodles stay pleasantly chewy.
How to Store & Reheat
This dish is at its best fresh, but leftovers can still be handled well with a little care. Store the broth, chicken, and leek in the refrigerator for up to 2 days. If possible, keep the noodles separate, because udon tends to absorb broth and soften as it sits.
For freezing, the broth with chicken freezes better than the noodles. Freeze that portion in a sealed container for up to 1 month. The leek will soften more after thawing, but the soup will still be flavorful and comforting.
To reheat, warm the broth gently on the stove over medium-low heat until hot. Avoid a long, hard boil, which can make the chicken less tender. If you have leftover noodles, dip them briefly into hot water or add them to the soup just long enough to warm through before serving.

Leeks with Udon Dish
Ingredients
For the broth
- 2 cups prepared dashi stock
- 1 tablespoon soy sauce
- 1 tablespoon mirin
- 1/2 tablespoon sugar
- 1 tablespoon sake
For the main
- 1 boneless skinless chicken thigh, cut into bite-size pieces
- 1 portion udon noodles using fresh-frozen or dried
- 1/2 small leek sliced from the white and pale green sections only
For the garnish
- 1/2 green onion finely sliced
Instructions
- In a saucepan set over medium heat, combine the dashi stock, soy sauce, mirin, and sugar. Bring the mixture to a boil and let it cook for 2 to 3 minutes so the flavors blend thoroughly.
- Add the sake, sliced leek, and chicken thigh pieces to the bubbling broth. Stir gently to distribute the ingredients, return the liquid to a boil, and cook for 3 to 4 minutes, until the chicken is cooked through and the leek is tender.
- At the same time, prepare the udon noodles according to the package directions. If using fresh-frozen udon, begin cooking them when the chicken is nearly finished. If using dried udon, start them earlier so they are ready at the same time as the soup.
- Transfer the cooked noodles to a serving bowl. Ladle the hot broth over them, making sure the chicken and leek are evenly divided. Finish with the sliced green onion and serve at once while hot.