Curry Udon Recipe: Japanese Noodles in a Savory Broth

Curry udon is a Japanese noodle soup in which thick udon noodles are served in a savory curry broth, often made with dashi, onions, and pork or beef. The broth gets its rounded flavor and gentle thickness from Japanese curry roux; family and regional versions vary in meat, vegetables, and spice level, so this version keeps the toppings simple and easy to adapt.

Ingredients

12 oz (340 g) boneless pork loin, cut across the grain into strips about ¼ inch (6 mm) thick
1 medium yellow onion, about 7 oz (200 g), thinly sliced
4 oz (115 g) shiitake or cremini mushrooms, thinly sliced
1 tablespoon (15 ml) neutral oil, such as canola
1 tablespoon (6 g) finely grated fresh ginger
5 cups (1.2 L) prepared dashi; for instant dashi, use 5 cups (1.2 L) water and 2 teaspoons (6 g) dashi granules, or follow the packet’s directions for that amount
3 tablespoons (45 ml) soy sauce
2 tablespoons (30 ml) mirin
1 teaspoon (4 g) granulated sugar
3 oz (85 g) Japanese curry roux, about 4 cubes depending on the package
1 tablespoon (8 g) cornstarch
2 tablespoons (30 ml) cold water, for the cornstarch slurry
28 oz (800 g) frozen or fresh udon noodles, usually 4 portions
3 scallions, about 1½ oz (45 g), thinly sliced
1 teaspoon (5 ml) toasted sesame oil, optional, for finishing
1 tablespoon (15 ml) toasted sesame seeds, optional, for serving

Instructions

Prepare the ingredients. Slice the pork, onion, mushrooms, and scallions, and grate the ginger. Measure the dashi, soy sauce, mirin, sugar, and curry roux so they are ready to use. If the roux comes in large blocks, break it into smaller pieces; smaller pieces dissolve more easily and are less likely to leave lumps.
Brown and cook the pork. Heat the oil in a heavy saucepan or Dutch oven over medium-high heat. Add the pork in a single layer, working in batches if needed, and cook for about 5–7 minutes, turning the strips so they brown and cook through. Check the thickest pieces with a food thermometer: the USDA FSIS safe minimum for whole cuts of pork is 145°F (63°C), followed by a 3-minute rest. Transfer the pork to a clean plate and let it rest for at least 3 minutes. Keep any juices on the plate for the broth.
Soften the vegetables. Lower the heat to medium. Add the onion and mushrooms to the same saucepan and cook for about 5 minutes, stirring occasionally, until the onion begins to soften and the mushrooms release some of their moisture. Stir in the ginger and cook for 1 minute. If the pan looks dry, add a tablespoon of water rather than more oil.
Build the broth. Pour in the dashi, scraping the bottom of the pan to loosen browned bits. Add the soy sauce, mirin, and sugar. Bring the liquid to a gentle simmer, then cook for 5 minutes so the onion softens further and the flavors mingle. Keep the broth at a simmer rather than a hard boil, which can make it reduce too quickly.
Dissolve the curry roux and thicken. Turn the heat to low. Add the roux pieces a few at a time, stirring until each addition has dissolved before adding the next. Simmer gently for 2 minutes, stirring often. Stir the cornstarch and cold water together in a small cup until smooth, then slowly stir the slurry into the broth. Cook for about 1 minute, until the broth lightly coats a spoon. Add the rested pork and its juices and stir until hot. Taste before adding any extra salt; curry roux and soy sauce can both be salty.
Cook the udon. While the broth finishes, bring a separate pot of water to a boil. Cook the udon according to the package directions, usually 1–3 minutes for frozen noodles and a little longer for some dried varieties. Separate the strands gently with chopsticks or tongs. Drain well. Avoid cooking the noodles directly in the curry broth: their starch can make the soup gluey, and the broth is easier to adjust when cooked separately.
Assemble and serve. Divide the drained udon among four deep bowls. Ladle the hot curry broth, pork, onions, and mushrooms over the noodles. Finish with scallions and, if you like, a few drops of sesame oil and sesame seeds. Serve promptly while the noodles are springy and the broth is hot.

Tips

Choose the roux with the heat level you want. Japanese curry roux is sold in mild, medium-hot, and hot styles, and the spice level varies by maker. Start with the amount in the recipe, then taste before adding more. Because roux contributes salt as well as spice, do not season the broth heavily until the end.
Use dashi if you can, but keep a practical substitute in mind. Dashi gives the broth a distinctly Japanese savory flavor. Instant dashi is convenient and works well here. If it is unavailable, use low-sodium chicken or vegetable broth; the result will be less characteristically dashi-forward, so taste before adding the soy sauce.
Keep the roux smooth. Lower the heat before adding it and stir in small pieces. If the broth is boiling vigorously, roux can stick to the bottom or form stubborn lumps. A cornstarch slurry is useful for a little extra body, but add it gradually; the broth should be spoonable, not paste-thick.
Cook the noodles separately and drain them well. Udon continues to absorb liquid as it sits. Keeping it out of the pot until serving helps preserve the broth’s consistency and the noodles’ texture. If fresh udon is especially delicate, follow its package directions rather than boiling it for the full time suggested for frozen noodles.

Serving Suggestions

Serve curry udon as a complete bowl, with a small side dish if you want a fuller meal. A crisp cucumber salad dressed with rice vinegar, a simple cabbage slaw, or lightly pickled vegetables provide a cool, tart contrast to the warm, savory broth. Steamed greens such as spinach or bok choy also work, either on the side or tucked into each bowl just before serving.

For a heartier table, offer rice alongside the noodles, though many people find the udon filling on its own. A small dish of Japanese pickles adds crunch and acidity. Set out extra sliced scallions, sesame seeds, and shichimi togarashi, a Japanese seven-spice blend, so diners can season their own bowls. Add chili sparingly: the curry roux may already have a noticeable heat.

Variations

Use beef instead of pork: Thinly sliced beef is a common choice for curry udon and has a deeper, richer flavor. Cook whole-cut beef to 145°F (63°C) and let it rest for 3 minutes before returning it to the broth. If the slices are too thin to check reliably, use a thicker piece or choose a different protein whose temperature can be checked accurately.

Make it vegetarian: Replace the pork with 8 oz (225 g) firm tofu, cut into cubes, and use vegetable broth or vegetable-based dashi. Brown the tofu in the oil before cooking the vegetables. Check that the curry roux and dashi granules are vegetarian, since some products contain meat or fish ingredients. The broth will be less meaty but still savory.

Add vegetables: Carrot, napa cabbage, spinach, or sliced leeks all fit comfortably into this soup. Add firm carrot with the onion and give it a few extra minutes to soften; stir tender greens in near the end so they do not become overcooked. Keep the total amount moderate so there is enough broth for the noodles.

Adjust the broth’s richness: For a lighter curry flavor, use a little less roux and skip the cornstarch slurry. For a thicker broth, add slurry in small increments and simmer briefly after each addition. Some cooks add a splash of milk or coconut milk, but this softens the dashi and curry flavors and makes a creamier, less traditional-style bowl.

Use another noodle when needed: Frozen udon is particularly convenient, but fresh or dried udon can work if cooked according to its package. Soba or thick wheat noodles can be substituted, though their flavor and texture differ from udon. Keep any substitute separate from the broth until serving, just as you would with udon.

Storage and Reheating

For the best texture, store the broth and noodles separately. Transfer both to covered containers and refrigerate within 2 hours of cooking. The pork curry broth keeps for 3–4 days in the refrigerator; cooked noodles are best within 2–3 days because they gradually soften. If the noodles have already been mixed into the broth, the dish is still safe to store on the same schedule, but expect a thicker broth and softer noodles.

Reheat the broth in a saucepan over medium heat, stirring often, until steaming throughout. Add a splash of water or dashi if it has thickened, and heat leftovers to 165°F (74°C). Warm refrigerated noodles briefly in boiling water, then drain and put them in bowls before adding the hot broth. Freeze the broth without noodles for up to 2 months for best quality; thaw it in the refrigerator before reheating. Freezing cooked udon can make its texture softer.

Frequently Asked Questions

What does curry udon taste like?

It tastes savory, gently spiced, and slightly sweet from the onion and mirin, with a rounded umami flavor from dashi, soy sauce, and curry roux. The broth is thicker than a clear noodle soup but should still flow easily around the noodles. The exact heat and richness depend on the curry roux and the amount used.

Can I use curry powder instead of Japanese curry roux?

Yes, but curry powder alone will not thicken the broth or taste quite the same. For a rough substitute, melt 2 tablespoons (28 g) butter in a small pan, stir in 2 tablespoons (16 g) flour and 1–2 teaspoons (2–4 g) curry powder, and cook for a minute before whisking in a little hot broth. The result is less convenient and may be less sweet and mellow than prepared Japanese roux, so adjust the seasoning to taste.

Can I make the broth ahead?

Yes. Prepare the broth with the pork and vegetables, cool it promptly, and refrigerate it separately from the udon. Reheat the broth gently when ready to serve, adding a little water or dashi if it has thickened. Cook or reheat the noodles separately so they do not soak up the broth while stored.

Why is my curry udon broth too thick?

Udon starch, extra roux, or too much cornstarch can make the broth heavier than intended. Thin it with hot water or dashi a little at a time, stirring between additions. For the next batch, cook and drain the noodles separately, measure the slurry carefully, and remember that roux thickens the broth as it simmers.

Can I make curry udon without meat?

Yes. Use firm tofu, mushrooms, or a combination of vegetables instead of pork, and choose vegetable-based broth and curry roux. Brown tofu or mushrooms for more savory depth, and check labels on dashi and roux if you want the bowl to be fully vegetarian. The cooking method for the broth and noodles stays the same.

What kind of udon is best for this recipe?

Frozen udon is a reliable choice because it is thick, springy, and quick to cook. Fresh udon also works well; dried udon is convenient but can have a firmer, less chewy texture. Follow the package directions, drain the noodles well, and add them to the bowls only when you are ready to serve.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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