Japanese curry udon is a comforting noodle dish served in Japan, made with chewy udon, savory dashi, and a gently thickened Japanese curry broth. It brings the familiar flavor of Japanese curry together with the clean, umami-rich base of noodle soup, and recipes vary by region, shop, and household. This version uses thinly sliced beef and ready-made curry roux for a practical bowl with classic flavors.
Ingredients
- 4 cups (960 ml) prepared dashi
- 4 portions frozen udon noodles, about 28 oz (800 g) total
- 10½ oz (300 g) thinly sliced beef, such as sukiyaki-style beef
- 1 large yellow onion, about 9 oz (250 g), thinly sliced
- 1 tablespoon (15 ml) neutral oil, such as canola oil
- 2 tablespoons (30 ml) Japanese soy sauce
- 2 tablespoons (30 ml) mirin
- 1 tablespoon (15 ml) sake
- 1 teaspoon (4 g) granulated sugar
- 4 Japanese curry roux cubes, about 2¾ oz (80 g), or the amount specified on the package for 4 servings
- 1 tablespoon (8 g) potato starch, optional, mixed with 2 tablespoons (30 ml) cold water
- 2 scallions, about 1 oz (30 g), thinly sliced
- ½ teaspoon (1 g) shichimi togarashi, optional, for serving
- 2 tablespoons (30 g) beni shoga, Japanese red pickled ginger, optional, for serving
Instructions
- Prepare the ingredients, about 20 minutes. Slice the onion and scallions, separate the beef slices if they are stuck together, and measure the dashi and seasonings. Break the curry roux into small pieces so it dissolves readily. If using the optional starch, stir it with the cold water in a small cup until smooth; stir it again just before using, since starch settles.
- Soften the onion and start the beef. Heat the oil in a medium Dutch oven or heavy saucepan over medium heat. Add the onion and cook for 5 to 6 minutes, stirring now and then, until softened and translucent but not deeply browned. Add the beef in loose handfuls and cook for about 2 minutes, turning to separate the slices. It does not need to be fully cooked at this point.
- Build the broth and cook the beef safely. Pour in the dashi, soy sauce, mirin, sake, and sugar. Bring the liquid to a gentle simmer, stirring to lift any browned bits from the pot. Simmer for about 4 to 6 minutes, until the beef is cooked through. Check a thicker folded slice with a food thermometer: USDA FSIS lists 145°F (63°C) as the safe minimum for whole cuts of beef, followed by a 3-minute rest. Let the curry stand off the heat for those 3 minutes before continuing.
- Thicken the curry broth. Turn the heat to low. Add the broken curry roux and stir until completely dissolved; avoid boiling vigorously, which can make the thick broth splatter. Simmer gently for 4 to 5 minutes, stirring often, until the broth coats a spoon. If it seems thinner than you like, stir in a little of the prepared potato-starch mixture and simmer for 30 to 60 seconds. Add more only if needed; the curry roux already thickens the soup.
- Cook the udon and serve. While the broth simmers, prepare the frozen udon in a separate pot according to the package directions, usually by heating it in boiling water for 1 to 3 minutes until loosened and hot. Drain well. Divide the noodles among four deep bowls, ladle the hot curry broth and beef over them, and finish with scallions. Add shichimi or beni shoga at the table if desired.
Tips
- Choose a dashi you like. Dashi is the savory Japanese stock that gives the broth its character. Kombu-and-katsuobushi dashi has a rounded, fragrant flavor; instant dashi granules are a convenient substitute and are widely used in home cooking. Follow the package directions to make 4 cups (960 ml). If using a saltier instant stock, taste the broth before adding extra soy sauce.
- Adjust the roux to your package. Japanese curry roux cubes differ in size and saltiness. Four cubes weighing about 80 g is a useful starting amount, but use the package’s four-serving guidance if it differs. If you only have curry roux intended for curry rice, it works here; the dashi and extra liquid turn it into a noodle broth.
- Keep the broth at a gentle simmer. Once the roux is in, stir regularly and keep the heat low. A hard boil can cause splashes and may make the thickened broth catch on the bottom. Add a small splash of dashi or water if the sauce gets too thick while you finish the noodles.
- Keep noodles and broth separate until serving. Udon continues to absorb liquid as it sits, so cooking it directly in the curry can leave you with very thick broth and soft noodles. Frozen udon is especially convenient, but dried or fresh udon can also work; use the package cooking time and drain it well.
Serving Suggestions
Serve curry udon immediately in deep bowls so the broth stays hot and the noodles remain springy. A small dish of beni shoga adds a sharp, lightly sweet contrast, while shichimi togarashi brings gentle heat. If you do not have either, sliced scallions alone are a perfectly good finish. Set out extra soy sauce only after tasting; the curry roux and stock may already provide enough salt.
For a fuller meal, pair the bowls with a simple cucumber salad, lightly dressed greens, or a few pieces of Japanese pickles. These crisp sides balance the rich, thick broth without competing with it. Some diners enjoy a small bowl of rice alongside the udon to catch the remaining curry, but the noodles and beef make this a substantial meal on their own.
Variations
Make it vegetarian. Leave out the beef and use kombu-shiitake dashi or a vegetarian instant dashi. Check the curry roux label, since some varieties contain meat extract. Add sliced mushrooms, such as shiitake or shimeji, with the onion and simmer until tender. The result is still savory, though it will lack the sweetness and richness beef contributes.
Use pork or chicken. Thinly sliced pork works in the same quantity and can be cooked in the simmering broth. If using chicken, cut boneless thighs into bite-size pieces and simmer until a thermometer in the thickest piece reads 165°F (74°C), the USDA FSIS safe minimum for poultry. Chicken takes longer than thin beef, so allow extra cooking time before adding the roux.
Add vegetables. Carrot, mushrooms, or a small amount of napa cabbage are easy additions. Cut firm vegetables thinly so they cook in the broth without adding a long wait; add them with the onion or simmer them in the dashi until tender. Keep the total volume moderate so there is enough broth to coat all four noodle portions.
Change the noodle format. Fresh or dried udon can replace frozen udon, but their cooking times and yields vary, so follow the packet and drain before serving. Soba has a more pronounced buckwheat flavor and is not the usual choice for this dish, but it can be used if udon is unavailable. The bowl will taste and feel noticeably different.
Storage and Reheating
For best texture, store the curry broth and udon separately. Transfer both to shallow containers and refrigerate within 2 hours of cooking. The broth keeps for 3 to 4 days in the refrigerator; cooked udon is best within 2 to 3 days, as it may soften. If the noodles have already been mixed into the broth, refrigerate the combined dish promptly and expect a thicker, softer result.
Reheat the broth in a saucepan over medium-low heat, stirring until it is steaming throughout. Add a splash of water or dashi if it has thickened. Reheat leftovers to 165°F (74°C), as recommended by USDA FSIS, checking with a food thermometer. Warm the noodles separately in hot water for about 30 to 60 seconds, then drain and top with the broth. Avoid repeatedly cooling and reheating the same portion. Freezing the broth is possible for up to about 2 months, though its texture can change; freeze without the noodles and thaw overnight in the refrigerator.
Frequently Asked Questions
What is the difference between curry udon and curry rice? Both often use Japanese curry roux, but curry udon is served as noodles in a dashi-based broth. Curry rice is generally thicker and spooned over rice. This recipe balances the concentrated flavor of roux with stock and seasons the broth with soy sauce and mirin.
Can I use curry powder instead of Japanese curry roux? You can, but curry powder alone will not produce the same thick, mellow sauce. Japanese roux cubes contain a blend of curry spices and thickening ingredients. For a substitute, use a Japanese-style curry powder blend and make a separate roux with butter or oil and flour, then add it gradually; season to taste because the result will vary.
Where can I find dashi, mirin, and udon? Japanese grocery stores commonly carry all three, and many general supermarkets stock frozen udon, mirin, and instant dashi in their international aisles. If mirin is unavailable, use 1 tablespoon (15 ml) water and an extra ½ teaspoon (2 g) sugar in its place; the broth will be less fragrant and slightly less rounded.
Is curry udon supposed to be very thick? It should be thicker than clear noodle soup, but still loose enough to flow around the noodles. Curry roux brands vary, so start with the amount listed for four servings and assess the broth after simmering. Use the optional starch only if it needs more body, adding it in small amounts.
Can I make the broth ahead? Yes. Prepare the broth through the roux step, cool it promptly, and refrigerate it separately from the noodles for up to 3 to 4 days. Reheat the broth to 165°F (74°C), adding a little dashi or water if needed, then cook or warm the udon just before serving for the best texture.
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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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