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Vegetarian Stir Fry Udon Noodles Recipe

Published: Dec 9, 2025 by Ivy · This post may contain affiliate links · Leave a Comment

Jump to Recipe· 4.3 from 71 reviews

If you’re craving a dish that’s both hearty and bursting with vibrant flavors, this Vegetarian Stir Fry Udon Noodles Recipe is exactly what you need. It combines the chewy, satisfying texture of udon noodles with fresh spring onions, tender mushrooms, and sweet flat beans, all brought together by a luscious sweet chili sauce. This recipe is a quick, crowd-pleasing meal that proves how simple ingredients can transform into an extraordinary culinary experience in just minutes.

Ingredients You'll Need

Inside a black frying pan, there is a mix of light brown sliced mushrooms and bright green chopped snap peas. The mushrooms are thin and curved, scattered in the pan mostly on the left side, while the snap peas are cut into small piece squares, spread evenly around the mushrooms. A wooden spoon with a natural brown color rests on the right edge of the pan, with its rounded head touching the mushrooms. The pan is on a silver stove with black burner grates visible around the edges. The background shows part of the shiny stainless steel stove and a dark surface. photo taken with an iphone --ar 4:5 --v 7

Every ingredient in this Vegetarian Stir Fry Udon Noodles Recipe plays a crucial role in creating a balanced and flavorful dish. From the rich aroma of sesame or avocado oil to the crunchy freshness of flat beans, each element adds body and character to this quick stir fry.

  • Vegetable oil (sesame or avocado): Provides a nutty, aromatic base for stir-frying and elevates the overall flavor.
  • Spring onion: Offers a delicate oniony crunch with vibrant green tops to finish.
  • Garlic clove (minced): Adds depth and a subtle pungency that wakes up the entire dish.
  • Sliced mushrooms: Introduces earthy texture and an umami boost that complements the noodles.
  • Flat bean (cut): Brings a crisp, fresh bite and a pop of color for visual appeal.
  • Udon noodles: Thick and chewy Japanese-style noodles that soak up the sauce beautifully.
  • Sweet chili sauce: Delivers a perfect balance of sweetness, spice, and tang to tie everything together.
  • Black pepper: Just a pinch to add a mild heat and subtle complexity.

How to Make Vegetarian Stir Fry Udon Noodles Recipe

Step 1: Prepare the Udon Noodles

Start by cooking the udon noodles according to the package directions. I love using pre-packaged udon noodles because they cook in just about a minute when soaked in hot water, then drained and rinsed under cold water to separate them perfectly without becoming mushy. Set them aside while you prepare the veggies.

Step 2: Heat the Oil and Aromatics

Heat your choice of oil in a large skillet over high heat. Once hot, toss in the minced garlic and the white parts of the spring onion for a quick 10-second stir-fry. This step infuses the oil with fragrant flavors that will coat every other ingredient.

Step 3: Cook the Vegetables

Add the sliced mushrooms and the sliced flat beans to the pan. Stir-fry these for about three to four minutes, until the mushrooms soften and the beans become slightly tender but still retain a bit of crunch. This keeps the vegetables fresh and vibrant, ensuring a perfect texture contrast with the noodles.

Step 4: Combine Noodles and Sauce

Next, add the cooked udon noodles along with the sweet chili sauce straight into the skillet. Stir everything together for two to three minutes, tossing continuously so the noodles get evenly coated and heated through. The sauce melds beautifully with the veggies here, creating an irresistible glaze.

Step 5: Finish and Garnish

Finally, sprinkle in the green parts of the spring onions for that last burst of freshness and color. Give one last gentle toss, then it’s ready to serve piping hot!

How to Serve Vegetarian Stir Fry Udon Noodles Recipe

In a black frying pan, there is a layer of green chopped vegetables mixed with sliced brown mushrooms spread on one side. On top of that, a pile of thick white noodles sits in the center, covered by a generous amount of bright red-orange sauce with a glossy texture. The pan rests on a stove with a silver stovetop, and a wooden spoon is placed on the edge of the pan. The background has a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Garnishes

While the green spring onion tops are already delightful, you can elevate your dish with a sprinkle of toasted sesame seeds or a few crushed peanuts for added texture and a nutty note. A light drizzle of soy sauce or a dash of lime juice also adds another exciting dimension if desired.

Side Dishes

This stir fry stands wonderfully on its own but pairs beautifully with simple sides like steamed edamame, a crisp cucumber salad, or even a light miso soup. These options keep the meal balanced and let your noodles shine as the star of the show.

Creative Ways to Present

For an Instagram-worthy presentation, serve the stir fry in rustic bowls nestled on banana leaves or alongside a beautifully arranged array of pickled vegetables. Garnishing with edible flowers or fresh herbs like cilantro adds instant high-end flair, perfect for impressing friends and family.

Make Ahead and Storage

Storing Leftovers

You can store any leftover Vegetarian Stir Fry Udon Noodles Recipe in an airtight container in the refrigerator for up to three days. Make sure the noodles have fully cooled before sealing to avoid sogginess and preserve the fresh flavors.

Freezing

Freezing this dish is not ideal because udon noodles tend to change texture and become mushy upon thawing. Instead, it’s best to keep it refrigerated and enjoy within a few days for maximum taste and texture.

Reheating

When reheating, use a skillet over medium heat with a splash of oil or a tablespoon of water to prevent sticking. Stir gently until warmed through, which helps revive the noodles’ chewiness and refreshes the vegetables nicely without drying them out.

FAQs

Can I add protein to this Vegetarian Stir Fry Udon Noodles Recipe?

Absolutely! Tofu cubes, seitan strips, or even cooked edamame can be great plant-based protein additions. Just add them when cooking the vegetables to heat through evenly.

What substitutions work for sweet chili sauce?

If you don’t have sweet chili sauce handy, a mix of honey, chili flakes, and a bit of rice vinegar can mimic the sweet-spicy balance. Soy sauce or hoisin sauce also bring a different, yet tasty, twist.

Can I use any other noodles instead of udon?

Sure! Thick rice noodles or even egg noodles work well as substitutes, though the chewy texture of udon is unique and truly special for this recipe. Adjust cooking times accordingly.

Is this dish gluten-free?

It can be, as long as you choose gluten-free udon noodles or substitutes and ensure your soy sauce or chili sauce is gluten-free. Double-check labels to be safe.

How spicy is this recipe?

The spicy kick is mild, thanks to the sweet chili sauce. If you prefer it hotter, add extra chili flakes or a dash of sriracha when stir-frying.

Final Thoughts

This Vegetarian Stir Fry Udon Noodles Recipe is such a treasure in the kitchen—quick, colorful, and full of heartwarming flavor. The next time you want to whip up something satisfying without fuss, give this a try! It’s a perfect way to bring friends and family together over a bowl of purely delicious comfort.

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Vegetarian Stir Fry Udon Noodles Recipe

Vegetarian Stir Fry Udon Noodles Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.3 from 71 reviews
  • Author: Ivy
  • Prep Time: 5 minutes
  • Cook Time: 8 minutes
  • Total Time: 13 minutes
  • Yield: 2 servings
  • Category: Main Course
  • Method: Stir Frying
  • Cuisine: Asian
  • Diet: Vegetarian
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Description

A quick and flavorful vegetarian stir-fry udon noodle recipe featuring fresh vegetables and a sweet chili sauce. Perfect for a satisfying and easy meal ready in just 13 minutes.


Ingredients

Vegetables

  • 2 spring onions, sliced (white and green parts separated)
  • 1 garlic clove, minced
  • ½ cup sliced mushrooms
  • ½ cup flat beans, cut into pieces

Main Ingredients

  • 14 oz udon noodles (pre-cooked or packaged)
  • 1 cup sweet chili sauce

Oils and Seasoning

  • 1 tablespoon vegetable oil (sesame oil or avocado oil preferred)
  • Black pepper to taste


Instructions

  1. Prepare the Udon Noodles: Cook the udon noodles according to the package instructions. For packaged udon noodles, briefly soak in hot water for about one minute to separate, then drain and rinse with cold water. Set aside.
  2. Heat the Oil: Heat 1 tablespoon of vegetable oil in a large skillet or pan over high heat until hot.
  3. Sauté Aromatics: Add the minced garlic and the white part of the spring onions to the skillet. Stir-fry for about 10 seconds until fragrant.
  4. Cook Vegetables: Add the sliced mushrooms and chopped flat beans to the skillet. Stir-fry for 3 to 4 minutes until the vegetables are slightly tender but still crisp.
  5. Add Noodles and Sauce: Incorporate the cooked udon noodles and pour in 1 cup of sweet chili sauce. Season with black pepper to taste.
  6. Combine and Heat Through: Stir-fry everything together for another 2 to 3 minutes, ensuring the noodles and vegetables are evenly coated and heated through.
  7. Finish and Serve: Add the green parts of the spring onions, give a quick stir, and serve immediately.

Notes

  • You can substitute flat beans with snap peas or green beans if preferred.
  • For added protein, consider adding tofu or tempeh to make it more filling.
  • If you prefer a spicier flavor, add a pinch of chili flakes or fresh chili.
  • Use sesame oil for a nuttier flavor or avocado oil for a neutral taste.
  • Make sure not to overcook the vegetables to maintain their crunchiness.

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Hey, I’m Ivy!

I’m a 28-year-old mom to my little prince, Pitter, who loves cooking and exploring flavors from around the world. What started in my home kitchen is now a space where I share simple, global-inspired recipes made with love.

 

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