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    Home » Soups and Salads

    Spicy Udon Noodle Soup

    January 10, 2022 By Melissa Huggins / Leave a Comment

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    This Spicy Udon Noodle Soup is a quick and simple Japanese-style comfort food made with thick and chewy udon noodles and loads of veggies in a spicy and well-seasoned broth. Topped with green onions and nori flakes to amp that umami flavor up a notch! It's all made in one pot and takes 35 minutes to make.

    Two bowls of udon noodle soup on a wood table with sauce and nori in the background.

    I'm a big soup fanatic and I just had to share this one with you guys. It does not disappoint! This delicious recipe is straight from the pages of The Friendly Vegan Cookbook by Michelle Cehn and Toni Okamoto and I get to share it with you. They are both well-known food bloggers and they teamed up to create a solid vegan cookbook that everyone can enjoy.
    The Friendly Vegan Cookbook: 100 Essential Recipes to Share with Vegans and Omnivores Alike is a great addition to anyone's cookbook collection. It contains veganized classics that are tried and true. You won't need anything fancy to create their simple yet flavorful recipes either. Just basic ingredients that can be found anywhere.
    This cookbook is perfect for newbies, veg-curious, or even the pros. It's a well-rounded book that covers all the basics and then some. It'll be a staple in your kitchen for years to come.
    You'll find recipes you can make every day like Breakfast Burritos, Blueberry Muffins, Shepherd's Pie, Ratatouille, Fettuccine Alfredo, Lasagna Soup, Fudgy Brownies and so much more. Your taste buds will never get bored!

    Table of Contents

    • What is in this Spicy Udon Noodle soup?
    • How to make Udon Noodle Soup
    • Can I use fresh or frozen Udon Noodles?
    • Can I make it gluten-free?
    • Storing left-overs
    • Spicy Udon Noodle Soup

    What is in this Spicy Udon Noodle soup?

    Noodles are known to be a staple in Japanese cuisine. One of the well-known ones aside from ramen and soba is udon. Made from wheat flour, it is the thickest noodle in the line-up and is known for its springy and slippery texture and its versatility.

    Cooked in its simplest soup form, it is called Kake udon. It is traditionally made with dashi, a Japanese stock base. This version uses vegetable broth instead which is just as delicious! Aside from Udon noodles, you will also need:

    Ingredients to make the soup on a marble table top.

    • Vegetables - This recipe uses yellow onions, celery, carrots, garlic, Napa or green cabbage, Bunashumeji, or Enoki mushrooms. It is quite a flexible dish though so feel free to add some of your favorite veggies too.
    • Soup base - Vegetable bouillon cubes dissolved in water.  Good quality, low-sodium cubes will add tons of amazing flavors to the dish. You can use regular broth if you don't have cubes.
    • Flavoring - a dash of Sriracha sauce and a sprinkling of freshly ground black pepper gives the dish a hint of spiciness that makes it even more appetizing! Add less or more, depending on how much spiciness you can tolerate.
    • Toppings - Green onions and Sushi nori (toasted seaweed) give the dish a finishing and distinct Asian flavor that rounds up the whole dish nicely!
    • Oil - Canola or any vegetable-based oil will do.

    Ingredient tip: Adding protein in the form of some diced extra firm tofu will make the soup more substantial and filling.

    Cut and prepped ingredients on a wood cutting board.

    How to make Udon Noodle Soup

    * This is a quick overview with step-by-step photos. For the complete ingredient amounts and instructions, scroll down to the recipe card.

    6 process photos of cooking udon noodle soup.

    1. Sauté all the vegetables except the cabbage in a large pot using medium-high heat until the onions turn translucent. Pour the water and bring it to a boil.
    2. Add the bouillon cubes, cabbage, and noodles and cook following package instructions.
    3. Remove from heat then add sriracha and ground pepper.

    Can I use fresh or frozen Udon Noodles?

    If you luckily come across fresh or frozen udon noodles, then you can definitely use them. Fresh or even frozen ones have better texture; they are springier and more elastic! Take note that they take less cooking time compared to dry noodles. Always check on package instructions before cooking.

    Can I make it gluten-free?

    All ingredients in this udon noodle soup recipe are naturally gluten-free except, unfortunately, the udon noodles. If you want to try this out though, there are gluten-free brands made with brown rice flour that you can use. As an alternative, you can try using soba noodles made from buckwheat. The appearance and texture will not be the same but still delicious.

    Storing left-overs

    It’s always best to consume it hot after cooking. The noodles will really absorb the liquid once it cools down. For any leftovers, you can place them in a tightly covered container and keep them in your fridge for 2-3 days. You can reheat it in a microwave or stovetop. You may have to add more broth with the reheat.

    Side view of udon noodle soup in a bowl with chop sticks on the side.

    More Soup Recipes to Enjoy

    • Sopa de Fideo
    • Ajiaco (Colombian Potato Soup)
    • Vegan Corn Chowder
    • Vegan Ramen
    • Chickpea Curry Soup

    I Love To Hear From You

    If you make this Udon Noodle Soup Recipe, let me know what you think by ★ star rating it and leaving a comment below. It would really make my day. You can also follow me on Instagram and share your creation with me. Just tag me @veganhuggs and hashtag #veganhuggs so I don’t miss it

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    5 from 2 votes

    Spicy Udon Noodle Soup

    It's no secret that we are crazy for noodles! We love them when it’s hot, and when it’s cold, and especially when they’re suspended in a piquant broth surrounded by perfectly cooked vegetables. You can find dried udon noodles in the Asian section of many grocery stores, or fresh udon noodles at many Asian markets. They vary considerably in size, shape, and consistency, so you might want to try a few different kinds to find your favorite.
    Prep Time15 mins
    Cook Time20 mins
    Total Time35 mins
    Course: Soup
    Cuisine: American, Japanese
    Servings: 6 people
    Calories: 232kcal
    Author: Melissa Huggins

    Ingredients

    • 1 tablespoon canola oil
    • 1 small yellow onion , diced
    • 2 ribs celery , sliced
    • 1 large carrot , julienned or diced
    • 3 cloves garlic , minced
    • 1 cup bunashimeji or enoki mushrooms long, skinny mushrooms (optional)
    • 9 cups water
    • 3 cubes vegetable bouillon
    • 2 ½ cups shredded napa or green cabbage
    • 12 ounces dry udon noodles
    • 1 tablespoon Sriracha sauce
    • Ground black pepper , to taste
    • 2 green onions sliced, for garnish (optional)
    • ½ sheet sushi nori toasted seaweed, finely sliced, for garnish (optional)

    Recommended Equipment

    • Large Pot
    Prevent your screen from going dark

    Instructions

    • In a large soup pot over medium-high heat, heat the canola oil. Add the onion, celery, carrot, garlic, and mushrooms (if using), and sauté, stirring occasionally, for 5 minutes or until the onion is tender and translucent.
    • Pour in the water and bring to a boil. Add bouillon cubes, cabbage, and noodles, and cook for the amount of time suggested on the package.
    • Remove from the heat and stir in the Sriracha sauce and pepper.
    • Divide the soup among single-serving bowls. Garnish each bowl with a sprinkle of green onions and finely sliced sushi nori (if using them).

    Notes

    Friendly Suggestion: Make this soup stretch further by adding a drained and diced block of extra-firm tofu. It will give you a couple of extra servings to enjoy as leftovers, plus a boost of protein. Win-win.
    Recipe from The Friendly Vegan Cookbook. Reprinted by permission of the publisher, BenBella Books.
    Notes by Melissa Huggins
    • I used avocado oil instead of canola, but you can use any cooking oil you prefer. 
    • This is relatively spicy with the sriracha. To reduce the heat, use less or omit altogether. You can always add more after serving. 
    • If you don't have sriracha, you can add a ½ teaspoon of crushed red pepper flakes when you sauté the veggies.
    • For a lower-sodium option, choose low-sodium bouillon cubes or broth.

    Nutrition

    Serving: 1bowl | Calories: 232kcal | Carbohydrates: 42g | Protein: 9g | Fat: 4g | Saturated Fat: 1g | Trans Fat: 1g | Sodium: 678mg | Potassium: 111mg | Fiber: 4g | Sugar: 7g | Vitamin A: 2120IU | Vitamin C: 5mg | Calcium: 29mg | Iron: 1mg
    Tried this recipe?Follow me @veganhuggs and mention #veganhuggs!

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    I’m Melissa Huggins – the creator of Vegan Huggs. I started this blog to share delicious vegan recipes that everyone will love. Yep, that includes carnivores, too! Read more...

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