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Comforting Vegetarian Udon Soup Recipe for Weeknight Meals

Many of my recipes are inspired by favorite restaurant dishes. My obsession with udon began in law school when I discovered a small local udon shop. I walked twenty minutes from campus just to enjoy their vegan udon and mushroom tempura, rain or shine. The broth there was unforgettable, and I set out to recreate that comforting, umami-rich flavor at home.

This version isn’t a traditional Japanese dashi-based broth, but it aims to capture the same savory balance using simple pantry ingredients. The result is a clear, mushroom-forward broth with depth and a touch of sweetness — perfect for a quick, satisfying bowl of udon.

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Breakdown of the Ingredients:

  • Shallots: I prefer shallots over red or yellow onions because their mild, sweet flavor lets the mushrooms shine as the main flavor of the broth.
  • Ginger, Garlic, and Carrots: These aromatics add essential depth and warmth. I always include them for a complete, layered broth.
  • Neutral Oil: Use a neutral oil, like canola, so the vegetables and mushrooms remain the focus. Strong-flavored oils can mask delicate savory notes.
  • Soy Sauce + Salt: Use soy sauce sparingly as a flavor enhancer. If the broth needs more seasoning, add salt first rather than more soy to avoid overpowering the other flavors.
  • Brown Sugar: A small amount of brown sugar balances the savory and bright flavors in the broth. My favorite udon shops often make their broths slightly sweet, so I add a generous spoonful here to emulate that profile.
  • Shiitake Mushrooms: Dried shiitake are traditional for maximum umami, but fresh shiitake work beautifully if that’s what you have on hand. They bring a meaty, savory character to the broth.
  • Veggie Broth + Water: I dilute store-bought vegetable broth with water so the aromatics and mushrooms form the primary flavor. A lighter broth base prevents the overall flavor from becoming too concentrated.
  • Udon Noodles: For convenience, I use frozen udon — they cook in under two minutes and provide the chewy, satisfying texture of fresh udon without the time investment.
  • Scallions: Use the white parts in the broth for added flavor and reserve the green tops as a crunchy garnish.
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Process + Keys to Success:

  • Sauté the shallots until translucent to build a sweet, savory base.
  • Add minced garlic and ginger and cook briefly until fragrant.
  • Stir in brown sugar and soy sauce, then add carrots, shiitake mushrooms, vegetable broth, and water.
  • If you have white parts of scallions, add them to the pot for extra flavor instead of discarding them.
  • Simmer the broth gently for 25–30 minutes to let the mushrooms and aromatics infuse the liquid fully.
  • Boil frozen udon for 1–2 minutes, then drain.
  • Combine the udon with the strained broth or ladle the broth over the noodles, then garnish.
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Toppings:

  • Scallions: The green tops add a bright, crunchy finish — essential for contrast.
  • Freshly Minced Ginger: A sprinkle of fresh ginger brings a bright, warming bite that complements the broth.
  • Bok Choy: Lightly blanched bok choy adds refreshing crunch and color.
  • Fresh Shiitake Mushrooms: Reserve and briefly cook a few mushrooms to serve on top for texture and visual appeal.
  • Seaweed: Small pieces of nori soften in the broth and add an extra savory layer.
  • Baked Tofu: Press extra-firm tofu, cube it, and bake at 350°F (175°C) for about 30 minutes until golden for a hearty protein addition.
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Udon with Mushroom Broth

By
Shreya Walia
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Ingredients

  • 2 small shallots
  • 1 tbsp minced garlic
  • 1 tbsp minced ginger
  • 2 tbsp oil
  • 2 tbsp soy sauce
  • 2-2.5 tbsp brown sugar
  • 4 oz shiitake mushrooms
  • 28 oz cans of veggie broth
  • 36 oz water
  • salt, (to taste)
  • 1/2 large carrot, (chopped)
  • frozen udon
  • scallions, (for garnish)

Instructions

  • Sauté shallots until translucent.
  • Add minced garlic and ginger and cook another minute.
  • Stir in brown sugar and soy sauce, then add carrots, mushrooms, vegetable broth and water.
  • Simmer the broth for 25–30 minutes to develop flavor.
  • Boil frozen udon for 1–2 minutes, then drain.
  • Combine the udon with the broth or ladle the broth over the noodles. Garnish with scallions and extra minced ginger. Add seaweed or baked tofu if desired.
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