Gomoku Udon (Udon with Mixed Toppings)

Gomoku udon is a comforting Japanese noodle soup centred on thick, springy udon served in a clear, savoury broth with a generous mix of toppings. The word gomoku points to variety, and here that comes through in the combination of earthy shiitake, sweet carrot, fresh bok choy and spring onion. Dashi, soy sauce and mirin give the soup its recognisable umami depth without making it heavy, while a softly set egg adds richness to the bowl. It is the kind of noodle dish that feels complete but still light, with colour, texture and warmth in every spoonful.
Cuisine style Japanese home cooking
Cooking style Meal prep friendly
Time commitment Under 1 hour

Why this recipe works

  • Clean, layered broth: Dashi gives the soup its savoury base, while soy sauce and mirin add saltiness, depth and gentle sweetness.
  • Varied textures: Chewy udon, tender vegetables, meaty shiitake and a soft egg make the bowl feel complete without heaviness.
  • Easy to adapt: The mixed-topping format works well with different greens, mushrooms or extra protein, as long as the broth stays balanced.

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Authenticity notes

  • Home-style udon: This is a practical Japanese-style bowl rather than a highly formal regional dish: a seasoned dashi broth, noodles and a colourful mix of toppings.
  • Dashi matters: Dashi is the defining flavour of the broth, giving it the light but savoury character associated with many Japanese noodle soups.

Timing notes

  • Serve straight away: Udon is best assembled just before eating so the noodles stay springy and do not continue absorbing the broth.
  • Prep first: Slice the vegetables and spring onions before starting the broth; once the soup is simmering, the toppings cook quickly.

Ingredient notes

  • Choose springy udon: Use udon noodles that cook up thick and elastic, then drain them well before adding the broth.
  • Stagger the greens: Add bok choy stems before the leaves so the stems become tender while the leaves stay bright and just wilted.

Make-ahead tips

  • Store separately: Keep the broth and toppings apart from the noodles in the fridge so the udon does not soften or dilute the soup.
  • Reheat gently: Bring the broth back to a gentle simmer until piping hot, then warm the noodles briefly and assemble the bowls just before serving.

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Ingredients
Instructions
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  1. Prepare the toppings: cut the carrot into fine matchsticks, slice the shiitake, and separate the bok choy stems from the leaves. Slice the spring onions, keeping a little of the green part for finishing.
  2. Bring a saucepan of water to a gentle simmer. Lower in the eggs and cook for 6 to 7 minutes for softly set yolks, then cool briefly under cold running water and peel.
  3. In a large pot, bring 900 ml water to a simmer and whisk in the dashi powder. Stir in the soy sauce and mirin, then keep the broth at a gentle simmer.
  4. Add the shiitake and carrot to the broth and simmer for 4 minutes until the carrot is just tender. Add the bok choy stems and simmer for 2 minutes, then add the leaves and cook for 1 minute until just wilted.
  5. Meanwhile, cook the udon noodles according to the packet instructions until springy. Drain well in a colander and divide between two bowls.
  6. Ladle the hot broth and toppings over the noodles. Halve the eggs and place on top, then finish with the spring onion and serve straight away.

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Recipe notes

Tips

  • Keep the broth at a gentle simmer rather than a rolling boil so it stays clear and the vegetables keep their colour.
  • For the best texture, cook and drain the udon just before serving so the noodles do not dilute the broth.
  • Egg safety: if serving to pregnant people, young children, older adults, or anyone immunocompromised, cook the eggs until the yolks are fully set.

Substitutions

  • Replace bok choy with spinach for a softer, quicker-cooking green.
  • Replace mirin with 1 tbsp water mixed with 1 tsp granulated sugar for similar sweetness and balance.
  • Replace shiitake mushrooms with button mushrooms for a milder flavour.

Storage

  • Refrigerate up to 2 days
  • Store broth and toppings separately from the noodles in airtight containers. Reheat the broth to a gentle simmer until piping hot, then warm the noodles briefly in hot water and assemble; add the egg cold or warm it in the hot broth for 1 minute.

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Gomoku Udon (Udon with Mixed Toppings)
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Recipe overview

  • Servings: 2 bowls
  • Total time: 45min (25min active)
  • Difficulty: Medium
  • Cuisine: Japanese
  • Allergens:
    Eggs Soybeans Wheat
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