Vegetarian udon noodle soup—a Japanese vegan recipe (2024)

By

Jolinda Hackett

Jolinda Hackett has written five books about plant-based cooking and has developed hundreds of vegan and vegetarian recipes.

Learn about The Spruce Eats'Editorial Process

Updated on 08/31/22

Tested by

Laurel Randolph

Vegetarian udon noodle soup—a Japanese vegan recipe (1)

A fervid lover of the culinary arts and all things Instant Pot, Laurel has been writing about food for 10 years. One of her cookbooks was the #2 cookbook of 2017.

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Prep: 10 mins

Cook: 20 mins

Total: 30 mins

Servings: 3to 4 servings

69 ratings

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A staple of Japanese cuisine, udon noodles have won the hearts and palates of food enthusiasts around the world. Thick, silky, and filling, these wheat noodles are commonly found in soups, with or without animal-based proteins, but always surrounded by thinly sliced vegetables and flavorful ingredients like soy sauce, rice vinegar, and ginger.

This particular vegan version of this Japanese-inspired soup is made with Chinese broccoli, scallions, fresh cilantro, and peanuts. It's similar to a traditional recipe, so you'll find it warming and filling but not heavy.

Dried udon noodles can be found in the international section of most supermarkets, but sometimes Asian markets and supermarkets sell the frozen version. What you really want is the fresh version, which you might be able to acquire from a local Japanese restaurant, as they're difficult to find elsewhere; if you can't find dried or frozen, use soba noodles instead.

Easy to make, our udon soup is a great introduction to classic Japanese flavors and a tempting light lunch or dinner.

Vegetarian udon noodle soup—a Japanese vegan recipe (2)

"This quick soup pairs a flavorful broth with chewy udon noodles for a satisfying dish. Feel free to play around with the ingredients to get the flavors just how you like them—I liked adding a splash of mirin. Tastes great topped with steamed or fried tofu." —Laurel Randolph

Vegetarian udon noodle soup—a Japanese vegan recipe (3)

A Note From Our Recipe Tester

Ingredients

For the Broth:

  • 4 cups low-sodium vegetable broth

  • 1 (1-inch) piece ginger, sliced

  • 2 tablespoons soy sauce

  • 1 tablespoon rice vinegar

  • 1 tablespoon vegetarian oyster or mushroom sauce

  • 1/2 teaspoon chili paste

  • 1 pinch granulated sugar

  • Kosher salt, to taste

  • Freshly ground black pepper, to taste

For the Chinese Broccoli:

  • 1 tablespoon peanut oil

  • 1/2 tablespoon minced ginger

  • 2 cloves minced garlic

  • 1 teaspoon sesame oil

  • 1 pound Chinese broccoli, coarsely chopped

For Assembling:

  • 1 pound fresh or frozen udon noodles, cooked according to package directions (or 14 ounces dried)

  • 2 medium green onions, thinly sliced

  • 1/4 cup coarsely chopped cilantro

  • 1/4 cup roasted, salted peanuts

Steps to Make It

Make the Broth

  1. Gather the broth ingredients.

    Vegetarian udon noodle soup—a Japanese vegan recipe (4)

  2. In a medium saucepan, combine the vegetable broth with the pieces of ginger, soy sauce, rice vinegar, oyster or mushroom sauce, chili paste, and sugar. Stir to combine and bring to a boil. Cover the pot and reduce to a simmer.

    Vegetarian udon noodle soup—a Japanese vegan recipe (5)

  3. Allow broth to simmer for at least 10 minutes. Remove the pieces of ginger from broth and discard. Taste and season lightly with salt and pepper if needed.

    Vegetarian udon noodle soup—a Japanese vegan recipe (6)

Make the Chinese Broccoli

  1. Gather the Chinese broccoli ingredients.

    Vegetarian udon noodle soup—a Japanese vegan recipe (7)

  2. In a separate large skillet, heat the peanut oil and add the minced ginger, garlic, and sesame oil over medium heat. Cook 1 to 2 minutes or until fragrant.

    Vegetarian udon noodle soup—a Japanese vegan recipe (8)

  3. Add the Chinese broccoli. Sauté for a few minutes, or until the broccoli is just tender and a lively green color. Remove from the heat and set aside.

    Vegetarian udon noodle soup—a Japanese vegan recipe (9)

Assemble the Noodle Soup

  1. Gather the ingredients for assembly.

    Vegetarian udon noodle soup—a Japanese vegan recipe (10)

  2. Prepare individual bowls by placing a serving of noodles in each, topping with the prepared Chinese broccoli, a generous amount of warm broth, some sliced green onions, chopped cilantro, and roasted peanuts. Serve.

    Vegetarian udon noodle soup—a Japanese vegan recipe (11)

Recipe Variations

  • Feel free to add more soy sauce, rice vinegar, oyster sauce, chili paste, and sugar to taste. You want a flavorful broth since it will infuse the other ingredients with its flavor.
  • You can add ingredients like mushrooms (dried or fresh) or mirin for extra flavor.
  • Our quick recipe is vegan and uses vegetable broth as a base, but if you'd like a more classic version, you can replace it with dashi, which has fish ingredients in it.

Kitsune Noodles

Kitsune noodles are a classic preparation of udon noodles. Topped with fried tofu, the soup is really delicious and filling thanks to the added protein in the tofu. For this version, simply follow the recipe as is but top each bowl of soup with a slice of fried tofu.

  • Simply press and remove any excess liquid from a package of extra-firm tofu, slice it into 2 pieces by cutting it diagonally and then slice each triangle in half by its thickness. Pat the tofu triangles dry with paper towels, drench in cornstarch, and deep fry in 350 F oil until golden brown on both sides. Sprinkle with sea salt.
  • Top the soup with a triangle of tofu. For a more elaborate version of this dish, you can fry the tofu twice for an extra special texture.

How to Store and Freeze

  • The best way to store noodles, whether in the refrigerator or in the freezer, is to separate the broth and veggies from the noodles into separate sealed containers; this is often the way you will receive Asian noodle-based soups if you purchase them for takeout. Store in the refrigerator for 3 to 5 days.
  • If you want to freeze the soup, just freeze the broth and veggies. Noodles like udon don't reheat well after they've been frozen. Just reheat in a saucepan over medium-low heat until it's hot all the way through.

Is Udon the Same as Ramen?

Udon and ramen are both noodles used in soup-based Japanese dishes loaded with noodles, veggies, and broths with similar ingredients. However, udon noodles are thicker, whiter, and typically vegan; ramen noodles are thinner, often made with eggs (so they're more yellow in color), and curlier in shape. Both of them, however, contain wheat flour; only soba is usually gluten-free, made from buckwheat (but read the package to be sure if that's a concern).

Nutrition Facts (per serving)
251Calories
10g Fat
33g Carbs
10g Protein

×

Nutrition Facts
Servings: 3to 4
Amount per serving
Calories251
% Daily Value*
Total Fat 10g13%
Saturated Fat 2g8%
Cholesterol 0mg0%
Sodium 1358mg59%
Total Carbohydrate 33g12%
Dietary Fiber 6g20%
Total Sugars 5g
Protein 10g
Vitamin C 77mg385%
Calcium 79mg6%
Iron 2mg12%
Potassium 574mg12%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

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Vegetarian udon noodle soup—a Japanese vegan recipe (2024)

FAQs

Is udon a vegetarian or non vegetarian food? ›

At its core, udon is made from a simple mixture of wheat flour, water, and salt, which at first glance, seems perfect for vegetarians and vegans. However, the traditional udon broth often leans on seafood, like dried sardines and bonito flakes, for its rich flavor.

Is Japanese udon vegan? ›

Generally yes, udon is vegan-friendly as it's simply made from wheat flour and water. They're one of the few types of noodles that don't commonly contain egg. However, it's always worth double-checking an ingredients list or asking at a restaurant to make sure.

How healthy is udon noodle soup? ›

Is Udon Soup Healthy? Aside from the flavourful textures and all-around taste that's tied to udon soup, the soup as a whole is greatly beneficial for you to eat. After all, it's filled with essential vitamins and minerals from its broth, noodles, and veggies that are in it to consume.

What's the difference between ramen broth and udon broth? ›

The broth too is different from ramen. Udon has two main types of broth each coming from a different part of Japan. Kanto style udon comes from the east and Kansai comes from the west. Kanto udon soup tends to be saltier and darker whereas Kansai is lighter and usually made with dashi.

What is vegetable udon made of? ›

There's nothing more comforting than a steaming bowl of Vegetarian Udon Noodle Soup! Made with vegan dashi broth and topped with minced mushroom, tofu, crispy fried eggplant, and bok choy, this is going to be your favorite thing to eat all year round.

What is udon soup broth made of? ›

To make udon soup broth, make dashi (Japanese soup stock) and season it with soy sauce, mirin, (sometimes sake), sugar, and salt. It's very simple and easy!

What is a good substitute for udon noodles? ›

What noodles can you use instead of udon noodles? You can use soba or ramen noodles in stir fries, but they don't have the same texture and thickness. Choose thicker ramen noodles to substitute in dishes with broths.

What do vegan Japanese eat? ›

Japanese food can be delicious and wholesome for both vegans and vegetarians. Rice and vegan-friendly noodles make up the base of most dishes. Tofu is available in a staggering variety of shapes and textures. Miso, a seasoning made of fermented soybeans and koji (a fungus) is in many dishes.

Is hoisin sauce vegan? ›

As per Wikipedia, Hoisin (海鮮) is actually the Chinese word for “seafood”, however, the sauce does not contain any seafood ingredients, so it's naturally vegan. Why is it called “hoisin” then? Because the sauce was often used as an accompaniment to seafood dishes.

Which is healthier ramen or udon? ›

Udon is considered the healthier of the two because it is typically served with simpler toppings. Ramen has more sodium due to kansui and is often served with butter and other rich toppings.

Is udon healthier than pasta? ›

Ramen or Udon Noodles

They have less fiber and protein than plain pasta and, unless they're enriched, fewer nutrients. Udon is thick and chewy, while ramen is thinner and springier. Serving suggestions: Instant soups can be ultraprocessed, and often loaded with sodium and unhealthy fat.

Are you supposed to drink udon broth? ›

The slurping enhances the flavors and helps cool down the hot noodles as they enter your mouth. If there is a broth, it is drunk directly from the bowl, eliminating the need for a spoon. It is not considered rude to leave some unfinished soup in the bowl at the end of the meal.

Which is better, udon or soba? ›

Which is Healthier, Udon or Soba? With its wholegrain like appearance and buckwheat heavy base, Soba is the healthier choice when it comes to your Asian noodle game. This is because buckwheat is lower in carbohydrates and lower in calories so it's a good choice for those trying to cut back.

What is the healthiest broth for ramen? ›

Shio is considered a healthier ramen because of the thinner broth. Instead of the flavor from fat in the liquid, it comes from salt and other seasonings. Keep it low in calories by minimizing the fatty toppings or adding more vegetables to your noodles.

Do Japanese drink all ramen broth? ›

At the end of the meal, it is alright to leave some unfinished soup in the bowl. You do not need to drink the whole bowl to be polite, although it is considered a compliment to the chef to do so.

Is ramen a vegetarian or non vegetarian food? ›

Top Ramen's chili flavored ramen is also vegetarian and vegan, though it is not as common as the Soy Sauce flavor. But be careful! Make sure you don't accidentally purchase Maruchan Original flavor, which is also in a blue package but is NOT vegetarian.

Is Japan vegetarian or non vegetarian? ›

Japanese cuisine is known for its heavy use of meat and fish, and even stocks and sauces usually have some ingredients containing meat. Vegetarianism and veganism are not as popular in Japan as it is in the West, so you'll find there's often some confusion as to what you can and can't eat.

What is udon made of? ›

Udon is made with flour and some salt. It is then kneaded and shaped like noodles. Soba, on the other hand, is made from powdered buckwheat, though in some areas, flour is also used. It is also kneaded and shaped like noodles.

Is bone broth non vegetarian? ›

Is there a vegetarian bone broth? Bone broth is, by definition, animal based (bone). If you want a vegetarian broth, you can make it with vegetables, just like you do with bone broth.

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