Easy Vegetarian Udon Soup (Japanese Noodle Recipe)

5 from 2 votes
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Savor this steaming bowl of Vegetarian Udon Soup. This recipe features chewy udon noodles and umami-rich kombu broth, perfect for a quick and wholesome meal!

Looking for easy udon recipes? Try my Kake Udon, Zaru Udon, or Tanuki Udon!

Vegetarian udon soup in a serving bowl.

I’ll walk you through the ingredients and step-by-step instructions. I hope you enjoy it!

Why You Will Love This Recipe 

  • This vegetarian udon soup is perfect for a quick weeknight meal.
  • You can create a delicious plant-based soup stock alternative with an easy step!
  • This recipe offers a warm and hearty meal, making it ideal for cold, chilly days.

Udon Noodles

Udon noodles, the classic Japanese noodle made with wheat flour and water, are a staple of Japanese cooking. These thick and white noodles have a chewy texture and can be enjoyed both hot and cold. Learn more about udon noodles in “What are Japanese udon noodles: A Beginner’s Guide

Recipe Ingredients

You’ll need the following ingredients to make this Vegetarian Udon Soup:

Vegetarian udon soup ingredients.
  • Udon noodles: At Japanese grocery stores or Asian markets, you can find udon noodles in different forms – dried, fresh, or frozen. In this recipe, I opt for frozen udon noodles for their quick preparation, requiring just a few minutes of boiling.
  • Egg, spinach, and scallions for the toppings. I’ll introduce more topping variations in the later section.
  • Kombu dashi powder, salt, mirin, and soy sauce for the noodle soup. Dashi, a type of soup stock, is the main ingredient in infusing your soup with savory flavors. To simplify the process, I recommend using store-bought kombu dashi powder. However, if it’s unavailable, you can prepare homemade kombu dashi or vegetable broth as a delicious alternative.

How To Make Vegetarian Udon Soup: STEP BY STEP 

Here are some quick visual instructions! For the video and all the detailed ingredients and instructions, go to the printable recipe card below.

How to make vegetarian udon soup.

Step 1

Boil the spinach and chop it into bite-sized pieces.

How to make vegetarian udon soup.

Step 2

Boil eggs and cut them in half.

How to make vegetarian udon soup.

Step 3

Put soup ingredients into a large pot and bring it to a boil.

How to make vegetarian udon soup.

Step 4

Boil udon noodles.

Vegetarian udon soup in a serving bowl.

Serve the noodles in a bowl, pour the soup, and finish it with toppings. Enjoy your Vegetarian Udon Soup while it’s still warm. If you like a spicy kick, top it with a sprinkle of shichimi togarashi, a Japanese spice blend.

Recipe Tips

  • Adjusting Soup Seasoning: If your udon soup is too salty, you can balance it by diluting it with water. Conversely, if it’s too mild, add more salt to enhance the flavor.
  • Udon noodles typically take a couple of minutes to cook frozen noodles and around 10 minutes or more for dried or fresh noodles. The cooking time can vary depending on the type and brand of udon noodles, so please follow the package directions.

Topping Variations

You have the flexibility to add various toppings. Here are some choices for enhancing your simple soup.

  • Bok choy
  • Snow peas
  • Green onions
  • Bean sprouts
  • Mushrooms
  • Sesame seeds
  • Soft-boiled eggs
  • Silken tofu
  • Firm tofu

Vegetarian Udon Recipe Variations

  • Miso Udon Soup – Enhance your soup with the addition of miso paste for a delightful umami flavor.
  • Vegan Udon Noodle Soup – You can easily make your udon noodle soup into a vegan recipe by replacing the boiled egg with a vegan protein alternative.
  • Vegetable Yaki Udon – a hearty stir-fried udon noodle dish filled with fresh vegetables, making it a healthy meal choice.
  • Miso Udon Carbonara – This recipe is an absolute must-try for you if you love creamy udon dishes.

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Vegetarian udon soup in a serving bowl.

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Vegetarian udon soup in a bowl.

Easy Vegetarian Udon Soup (Japanese Noodle Recipe)

5 from 2 votes
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Prep: 5 minutes
Cook: 10 minutes
Total: 15 minutes
Servings: 2 servings
Author: Juri Austin
Savor this steaming bowl of vegetarian udon soup. This recipe features chewy udon noodles and umami-rich kombu broth, perfect for a quick and wholesome meal!

Equipment

  • 1 Medium saucepan 18 cm/7 inches
  • 1 Strainer

Ingredients

  • 2 packs Udon noodles, about 360g
  • ¼ Scallion
  • A handful Spinach
  • 2 Eggs

Noodle Soup

  • cup Water, 780ml
  • 1 tsp Kombu dashi powder, 5g
  • 2 Tbsp Mirin
  • 2 Tbsp Soy sauce
  • ½ tsp Salt

Instructions

  • Preparation of Ingredients: Finely chop the scallion. Boil the spinach, drain, and chop it into bite-sized pieces. Boil eggs until cooked to your desired doneness, then cut them in half.
  • Make the Udon Soup: In a large pot, add water, kombu dashi powder, mirin, soy sauce, and salt and boil over medium heat.
  • Boil the Udon Noodles: While making the soup, add the udon noodles to a separate pot of boiling water and cook them for about two minutes.
  • Drain the noodles: Drain using a strainer and quickly rinse under cold water to remove the extra starch.
  • Serve: Serve the drained noodles in a bowl, pour the soup, and place the boiled egg, spinach, and scallions on top. You can top it with shichimi togarashi, a Japanese spice, for an extra kick.

Video

Notes

  • Adjusting Soup Seasoning: If your udon soup is too salty, you can balance it by diluting it with water. Conversely, if it’s too mild, add more salt to enhance the flavor.
  • Udon noodle cooking time typically takes a couple of minutes to cook frozen udon noodles and around 10 minutes or more for fresh or dried udon noodles. The cooking time can vary depending on the type and brand of udon noodles, so please follow the package directions.

Nutrition

Serving: 1serving | Calories: 550kcal | Carbohydrates: 65g | Protein: 38g | Fat: 16g
Course: Main
Cuisine: Japanese
Keyword: vegetarian udon soup
Did You Make this recipe?Please Leave a star rating!

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