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Crispy Tempura Udon Noodle Soup

Discover this comforting Japanese udon noodle soup in dashi broth with crispy tempura rings. Easy, vegetarian recipe ready in 50 minutes.

⏱ 50 min
📋 20 min prep
🔥 30 min cook
🍽 4 servings
🔥 400 kcal · calories per serving
medium
Sopa Udon con Tempura Crujiente

Udon is a thick, chewy Japanese noodle that absorbs broths beautifully. Paired with light, crispy tempura, this dish delivers a perfect balance of texture and homemade umami.

Ingredients

How many are you cooking for?

Original recipe for 4 servings

  • 400 g fresh or frozen udon noodles
  • 1 L dashi broth (kombu and shiitake)
  • 200 g tempura flour (or all-purpose)
  • 2 large eggs
  • 500 ml ice water
  • 1 tbsp mild soy sauce
  • Neutral oil for frying (canola or sunflower)
  • Chopped scallion greens for garnish
  • Nori seaweed sheets for decoration

Step by step

Follow the timeline: technique icon, time and temperature when relevant.

  1. Step 1 Cook 10 min 80 °C

    Prepare the dashi broth by heating water with kombu at 80 °C for 10 min, remove the kelp, and add dried shiitake. This step extracts natural glutamates that give body without fat. Tip: do not boil kombu vigorously to avoid bitterness.

  2. Step 2 Mix 5 min

    Whisk the tempura batter in a cold bowl: combine flour, beaten egg, and ice water with chopsticks until visible lumps remain. The cold temperature and minimal handling trap air and prevent the batter from absorbing excess oil. Tip: let it rest 5 min before frying.

  3. Step 3 Pan 2 min 170 °C

    Fry the tempura in a deep pan or wok with oil at 170 °C. Add vegetable or tofu pieces, brown for 2 min per side, and drain on a rack. The medium temperature ensures lasting crunch without a greasy coating. Tip: shake off excess batter before lowering into the oil.

  4. Step 4 Cook 4 min 100 °C

    Hydrate the udon noodles in boiling water for 3-4 min if fresh (or 8 min if frozen). Drain, rinse under cold water to stop cooking, and remove surface starch. Tip: add a splash of vinegar to the cooking water to preserve elasticity.

  5. Step 5 Pot / simmer 5 min

    Heat the dashi broth in a pot over medium heat, add soy sauce, and bring to a simmer. Distribute noodles in bowls and carefully pour the hot liquid. Tip: serve the broth just before boiling to keep volatile aromas intact.

  6. Step 6 Serve 2 min

    Plate the soup by garnishing with fresh scallions, nori strips, and freshly fried tempura. The contrast between soft noodles, umami broth, and crunchy coating completes the experience. Tip: add tempura at the very last second so it stays crisp before eating.

Storage

Store noodles and broth separately in the fridge for up to 3 days. Tempura freezes on a tray and reheats in an air fryer at 180 °C for 5 min. Do not mix until serving.

Chef tips

  • Keep tempura water always ice-cold; cold inhibits gluten development and prevents a gummy batter.
  • Do not stir udon noodles vigorously while boiling; gently move the pot to prevent sticking.
  • Taste the broth before serving; if it lacks depth, dissolve a pinch of white miso to round out the flavor.

Tags

  • #soups
  • #japan
  • #vegetarian
  • #udon
  • #tempura
  • #autumn
  • #one-dish
  • #japanese-noodles
  • #dashi
  • #quick-cooking