Easy Soy Egg Udon Stir-Fry (20 Minutes)

Name: Easy Soy Egg Udon Stir-Fry (20 Minutes)
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Ingredients: 2.2 lb udon noodle (frozen kind); 6 large eggs (beaten); 4 cups Chinese broccoli (cut into 1-inch long pieces, thick stalks sliced thinly); 3 garlic cloves (minced); 2 tbsp vegetable oil (or any neutral oil, divided); 1 tsp sesame seeds (toasted kind); 2 tbsp dark soy sauce; 1 tbsp regular soy sauce; 1 tbsp oyster sauce; 1 tbsp Chinese black vinegar (or rice vinegar); 1 tbsp sesame oil (toasted kind); 2 tsp white granulated sugar; ½ tbsp cornstarch; 1 tbsp water (cold)

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Bouncy udon noodles are stir-fried with soft scrambled eggs and Chinese broccoli in a savory soy-based sauce. This easy soy egg udon stir-fry recipe is ready in just 20 minutes in one pan. It's a quick and satisfying meal for busy weeknights, lunch, or dinner.

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Ingredients & Substitutes
Expert Tips
Instructions
Storage & Reheating
Pairing Suggestions
FAQ
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📖 Recipe

Soy egg udon stir-fry is a Japanese-inspired noodle dish made with chewy udon, scrambled eggs, Chinese broccoli, and a savory soy-based sauce. It isn't a traditional Japanese dish, but rather one I created based on my love for eggs, udon, and Japanese cuisine.

I first made this dish years ago using leftover ingredients in my fridge that I didn't want to waste, and it turned out so well that I've been making it ever since.

For the best texture, I briefly soak the udon in boiling water just until loosened. This keeps the noodles bouncy and chewy during stir-frying instead of turning soggy.

Ingredients & Substitutes

Exact ingredient amounts are listed in the recipe card at the bottom of this page.

Frozen Udon Noodles: I prefer frozen udon for the best bouncy, chewy texture. Refrigerated udon also works; prepare it according to package directions before stir-frying. Avoid shelf-stable vacuum-packed udon if possible, as they're more brittle and can break during stir-frying.
Chinese Broccoli (Gai Lan): The slightly bitter flavor balances the savory sauce. Yu choy sum or bok choy also works; adjust the cooking time as needed until the stems are tender-crisp and the leaves are wilted.
Large Eggs
Garlic: Fresh garlic works best, but jarred minced garlic also works in a pinch.
Toasted Sesame Seeds: Black sesame seeds also work, or toast raw sesame seeds in a dry pan over medium heat until golden.
Vegetable Oil: Or use any neutral cooking oil with a high smoke point, such as canola, peanut, or refined avocado oil.

Noodle Sauce

Dark Soy Sauce: Gives the udon a deeper brown color and richer soy flavor. I prefer using Pearl River Bridge Superior because it's thicker and darker than other brands. Mushroom-flavored dark soy sauce also works.
Regular Soy Sauce: Provides the main salty, savory flavor in the noodle sauce. Light or low-sodium soy sauce also works.
Oyster Sauce: Gives the noodle sauce a deeper savory flavor and slight sweetness. Vegetarian stir-fry sauce also works.
Chinese Black Vinegar: I prefer using Chinkiang vinegar, which adds mild tanginess that balances the savory soy and oyster sauces. Rice vinegar or apple cider vinegar also works.
Toasted Sesame Oil: Adds a rich, nutty flavor to the noodle sauce. Avoid untoasted sesame oil, which tastes milder.
White Granulated Sugar: Balances the salty soy sauces and tangy vinegar.
Cornstarch: Lightly thickens the sauce so it coats the udon instead of remaining watery. Potato starch also works.
Cold Water

Note: Asian ingredients are typically available at most Asian grocery stores or online.

Expert Tips

Drain the udon well because excess water can dilute the sauce and prevent it from coating the noodles properly.
Slice thicker broccoli stems thinner so they cook at the same rate as the leafy portions.
Prepare everything in advance because this stir-fry cooks quickly and delays can cause the ingredients to overcook.
Remove the eggs while still moist because they'll cook a little more when returned to the hot noodles.
Don't overcook the noodles once the sauce is added, as prolonged cooking can make the udon too soft.

Instructions

Below are step-by-step instructions on how to make soy egg udon stir-fry:

Make the noodle sauce: In a small bowl, whisk together all the noodle sauce ingredients until the sugar and starch are fully dissolved. Set aside.
Loosen the udon: Place the frozen udon noodles in a large heat-safe bowl and cover with boiling hot water. Soak for 20-30 seconds, just until the noodles loosen. Gently separate them with chopsticks or tongs, then drain well in a colander. Do not rinse with cold running water. Set aside.
Cook the eggs: Heat 1 tablespoon (15 ml) vegetable oil in a large pan over medium heat. Add the beaten eggs and gently scramble them into bite-sized pieces until just set but still moist. Remove and set aside.
Cook the Chinese broccoli: Add the remaining 1 tablespoon (15 ml) vegetable oil to the pan, followed by the Chinese broccoli and garlic. Stir-fry until the stems are tender-crisp and the leaves are wilted.
Add the noodles and sauce: Add the drained udon. Re-whisk the noodle sauce and pour it into the pan. Toss until the noodles are evenly coated in the sauce and heated through.
Add the eggs: Return the cooked eggs to the pan and gently toss with the noodles until combined.
Finish and serve: Remove from the heat and transfer to a large serving plate. Then garnish with toasted sesame seeds and serve immediately.

Storage & Reheating

Refrigerator: Store leftovers in an airtight container in the refrigerator for up to 4 days.
Freezer: I don't recommend freezing this dish because the udon and Chinese broccoli can become soggy and the eggs can turn rubbery after thawing.
Reheating: Microwave for 2-3 minutes until hot, or reheat in a pan over medium heat until warmed through.

Pairing Suggestions

Serve this soy egg udon stir-fry:

Spicy Asian Cucumber Salad: A light, refreshing side that balances the savory noodles.
Chicken Karaage: Crispy Japanese fried chicken makes this a more substantial meal.
Vegetable Gyoza: A simple appetizer that pairs well with the soy-based udon.

FAQ

Why did my udon noodles turn soggy?

The udon may have been soaked or stir-fried for too long. Soak the frozen udon in boiling water only until the noodles loosen, drain well, and toss them with the sauce just until heated through.

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