There's a specific sound this dish makes about two minutes into cooking, when the kimchi juice hits the hot oil and starts to hiss. That's the moment you know dinner is going to be good. Kimchi udon is one of those recipes that looks fancier than it is. It's really just noodles, bacon, and kimchi doing all the work, tied together with a sauce that's sweet, spicy, and a little tangy all at once.
I make this on nights when I don't want to think too hard about dinner but still want something that tastes like I tried. The thick, chewy udon noodles soak up the sauce without falling apart, which is exactly what you want when kimchi is involved. Regular thin noodles just get lost in all that flavor.
The one thing that actually matters here is your kimchi. Use the aged, funky stuff that's been sitting in your fridge for a few weeks, not the fresh crunchy batch. Aged kimchi turns soft and deeply sour when it cooks, and that sourness is what balances the sweetness in the sauce. Fresh kimchi just goes limp without giving you much flavor back.
If you love kimchi tossed with noodles, don't stop here — try it cold in our Cold Kimchi Noodles or without the udon in a classic Bibim Guksu.
Kimchi Udon Stir Fry
Chewy udon noodles stir-fried with crispy bacon and aged kimchi in a sweet, spicy gochujang sauce, topped with a fried egg and sesame seeds.
Prep 10 min
Cook 12 min
Cuisine Korean
Yield
2 serving
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Units
Ingredients
Instructions
Cook the udon noodles according to the package instructions. Fresh noodles usually just need a quick dunk in boiling water; frozen ones need about a minute soaking in hot water to loosen up. Drain and set aside.
In a small bowl, mix the gochugaru, gochujang, soy sauce, honey, garlic, sesame oil, and rice vinegar (if using). Set the sauce aside.
Heat the cooking oil in a large pan or skillet over medium-high heat. Add the bacon and cook for , stirring occasionally, until the edges start to crisp up.
Add the onion and cook for about a minute, until it softens slightly.
Add the kimchi and its juice. Cook for , stirring, until the kimchi turns a shade darker and smells deeply sour and toasty.
Pour in the sauce and stir everything together. Let it bubble for about so the flavors come together.
Add the noodles and toss until every strand is coated in the sauce, about . If the pan looks dry, splash in a tablespoon or two of water to loosen things up.
Stir in half the green onion, then plate up. Top with the egg, remaining green onion, sesame seeds, black pepper, and seaweed strips.
Notes & Variations
No bacon on hand? Spam, thin pork belly, or even canned tuna all work well here. For a vegetarian version, swap in firm tofu or extra mushrooms.
If you like it hotter, add an extra half tablespoon of gochugaru or a small squeeze of gochujang straight into the pan at the end.
Leftovers keep in an airtight container in the fridge for up to 3 days. The noodles soak up sauce as they sit, so reheat in a pan with a small splash of water to bring back the moisture.
Taste your kimchi before you start. Older, sourer kimchi needs less rice vinegar; younger kimchi benefits from adding it.
Nutrition (approx., per serving): Calories: 430 kcal · Protein: 16g · Carbs: 54g · Fat: 17g · Saturated fat: 4.5g · Cholesterol: 40mg · Sodium: 980mg · Fiber: 3g · Sugar: 9g Estimated values per serving based on the ingredients used, not including the optional egg or seaweed garnish. Actual nutrition may vary depending on brands and portion sizes.
FAQ
Can I use regular ramen noodles instead of udon?
Yes, but the texture won't be quite the same. Udon's thick, chewy bite is what makes this dish so satisfying, while ramen noodles are thinner and soak up more sauce. If that's all you have, cut the water or kimchi juice slightly so the noodles don't turn mushy.
Why did my kimchi udon turn out watery?
It usually comes down to too much kimchi juice or noodles that weren't drained well. Shake off excess water after cooking the noodles, and if your kimchi is very juicy, hold back a bit of the liquid until you see how saucy the pan looks.
What's the best kimchi to use for kimchi udon?
Aged kimchi, the kind that's been in your fridge for at least two weeks, works best. It turns soft and sour when cooked and gives the sauce real depth. Fresh, crunchy kimchi doesn't break down the same way and leaves the dish tasting flatter.
How do I store and reheat leftovers?
Keep leftovers in an airtight container in the fridge for up to 3 days. When reheating, add a small splash of water or broth to the pan before warming it over low heat, since the noodles will have soaked up most of the sauce overnight.
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Jiwon Kim is a home cook from Seoul who studied Food Science and Nutrition. She writes approachable home-style recipes — Korean rice, soup, banchan, and fermented staples, plus favorite dishes from across Asia — explained simply for cooks outside Korea.
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