How to cook Japanese Mushroom Onion Udon Soup

If you’re looking for a delicious Japanese Mushroom Onion Udon Soup recipe, try this recipe. It’s vegan-friendly and extremely nutritious, and you’ll love it! The perfect soup is quick and easy to make. The ingredients include udon noodles, mushrooms, and Asian greens. In addition, you can add chicken, beef, or fish for a vegetarian meal. A vegan version of this dish is also available.

Mushroom Onion Udon Soup Recipes

Mushroom Onion Udon Soup.
A symphony of flavors – mushroom onion udon soup.
How To Cook Japanese Mushroom Onion Udon Soup 1

Japanese Mushroom Onion Udon Soup

This udon soup has a wonderfulOriental flavor, and it only takes about 20 minutes to whip it together. Whenthe day or evening is chilly, this will be one of your go-to recipes, to warmyou up and fill you up.
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Course: Noodle, Soup
Cuisine: Japanese
Diet: Vegan
Keyword: mushroom, onion, udon
CookingStyle: Boiling
Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 20 minutes
Servings: 4 servings
Calories: 230kcal
Author: James Anderson
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  • 3 chopped green onions
  • 4 thinly sliced mushrooms whole
  • 1/2 shredded carrot
  • 1 minced garlic clove
  • 4 cups broth chicken
  • 1 tbsp. cooking sherry
  • 1 tsp. ginger dressing
  • 1 tsp. sesame & miso dressing
  • 1 x 7 ounce package Udon noodles mushroom


  • In large sized pot, combine seasoning packet from noodles with chicken broth. Add sesame and miso dressing and ginger dressing.
  • Add cooking sherry. Stir entire mixture till seasoning packet dissolves.
  • Stir in carrot, mushrooms, garlic and green onions.
  • Bring broth to boil. Add udon noodles. Reduce heat. Allow soup to simmer for three to four minutes.
  • Remove soup from heat. Ladle into bowls and serve.



To make this delicious soup, you must cook the udon noodles. This is a great way to get the nutrients you need from udon. It's also a great way to get a healthy dose of mushrooms, which are rich in fiber. Just be sure to add lots of vegetables! The soup is a delicious and nutritious way to start your day. The best thing about it? It's vegan-friendly and super-easy. And it's packed with amazing flavors!
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Serving: 1serving | Calories: 230kcal | Carbohydrates: 44g | Protein: 9g | Fat: 2g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Cholesterol: 1mg | Sodium: 1649mg | Potassium: 120mg | Fiber: 4g | Sugar: 9g | Vitamin A: 1865IU | Vitamin C: 3mg | Calcium: 12mg | Iron: 1mg

Alternative Method: Mushroom Onion Udon Soup in the Instant Pot

Mushroom Onion Udon Soup.
Garnish galore – elevate your udon experience.


  • 8 oz udon noodles
  • 8 oz cremini or shiitake mushrooms, sliced
  • 1 large onion, thinly sliced
  • 4 cups vegetable broth
  • 2 cloves garlic, minced
  • 2 tablespoons soy sauce
  • 1 tablespoon vegetable oil
  • 1 teaspoon sesame oil
  • Salt and pepper, to taste
  • Garnishes: green onions, sesame seeds


  • Sauté Onions and Mushrooms: Set the Instant Pot to Sauté mode and add vegetable oil. Once hot, sauté the sliced onions and garlic until fragrant. Add the sliced mushrooms and continue sautéing until they soften.
  • Deglaze with Soy Sauce: Pour in the soy sauce to deglaze the pot, stirring well to coat the onions and mushrooms in the savory sauce.
  • Add Noodles and Broth: Break the udon noodles in half and add them to the pot. Pour in the vegetable broth, giving it a gentle stir to ensure the noodles are submerged.
  • Pressure Cook: Close the Instant Pot lid, set it to High Pressure, and cook for 2 minutes. Ensure the pressure valve is sealed.
  • Quick Release and Season: After cooking, perform a quick pressure release. Open the lid and add sesame oil. Season with salt and pepper to taste.
  • Serve and Garnish: Ladle the Instant Pot Mushroom Onion Udon Soup into bowls and garnish with chopped green onions and a sprinkle of sesame seeds. Enjoy your quick and delicious udon soup!

Tips for making Mushroom Onion Udon Soup

Mushroom Onion Udon Soup
The sizzle of onions and mushrooms – sautéing to perfection.

Serving Suggestions

  • Garnish with Abundance: Make your udon soup visually appealing by garnishing generously. Fresh green onions, cilantro, and a sprinkle of sesame seeds not only add a pop of color but also enhance the flavors.
  • Crunchy Companions: Serve your soup with a side of crispy vegetable spring rolls or tempura for a delightful contrast in textures.
  • A Touch of Heat: If you’re a fan of spice, offer a small dish of chili oil or hot pepper flakes on the side. Your guests can customize the heat level of their soup.
  • Udon Dipping Sauce: Provide a small dipping sauce made from soy sauce and a hint of rice vinegar. It’s perfect for dipping udon noodles, adding an extra layer of flavor.
  • Pair with Green Tea: A cup of hot green tea complements the umami flavors in the soup beautifully. It cleanses the palate and refreshes your taste buds between bites.

Cooking Tips

Mushroom Onion Udon Soup
Quick and convenient – mushroom onion udon soup in the instant pot.
  • Use the Right Mushrooms: While cremini and shiitake are wonderful choices, feel free to experiment with other mushroom varieties like oyster or enoki for different flavor profiles.
  • Prevent Overcooking Noodles: To avoid mushy noodles, follow the recommended cooking time for udon noodles and set a timer. Once cooked, immediately run the noodles under cold water to stop the cooking process.
  • Mind the Salt: Be cautious with adding extra salt since soy sauce is already salty. Taste the soup before seasoning to avoid making it overly salty.
  • Vegetarian or Vegan Options: To make this soup vegetarian or vegan, simply use vegetable broth and ensure your udon noodles don’t contain egg.
  • Quick Release Caution: When using the Instant Pot, be careful with the quick release to prevent hot steam burns. Use a long utensil or oven mitt to open the valve.
Read  Easy-to-cook Japanese Radish Tofu Soup Recipe

FAQs about Mushroom Onion Udon Soup

Mushroom Onion Udon Soup
The beauty of customization – udon dipping sauce for your noodles.
  • Can I use a different type of noodle if I can’t find udon?Absolutely! Soba noodles or rice noodles work as great alternatives for udon.
  • How do I store leftover udon soup? Store any remaining soup in an airtight container in the refrigerator for up to 2-3 days. Reheat gently on the stovetop.
  • What can I substitute for soy sauce if I have a soy allergy? For a soy-free version, use coconut aminos, tamari, or a soy sauce substitute made from other ingredients like Bragg Liquid Aminos.
  • Are there gluten-free udon noodles available? Yes, you can find gluten-free udon noodles made from rice flour or other alternatives in some stores or online.
  • Can I add other vegetables to this soup? Absolutely! Bok choy, spinach, or broccoli florets make great additions. Simply add them when you sauté the onions and mushrooms for a more wholesome meal.

Discover the art of flavor with our Mushroom Onion Udon Soup recipe. Unleash umami goodness at home in under 30 minutes.

I'm James F Anderson, a noted sous chef from London and a Le Cordon Bleu alumnus. My career began in a Michelin-starred Parisian eatery, where my blend of classic and contemporary cooking, using seasonal ingredients, earned accolades. Recognized in culinary publications and on cooking shows, I’m committed to mentoring aspiring chefs and delivering memorable dining experiences, marking me as a standout talent in the culinary world.
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