Today I’m sharing the first recipe in a short series of my favorite Korean summer dishes: bibim guksu. This simple, spicy cold noodle dish comes together in about 10 minutes and is one of my go-to meals for hot days. If you love bold, tangy, and spicy flavors with a refreshing cold texture, bibim guksu is an excellent choice.
Bibim guksu is one of my all-time favorites. I prefer cold, spicy noodles above most other noodle dishes — their bright, punchy flavors and cool texture are incredibly satisfying on a warm day. There are several related dishes — bibim guksu, bibim naengmyeon, and milmyeon — but this one is exceptionally quick and easy to make at home.
Ingredients
- Somyeon (somen) – Thin wheat noodles that cook very quickly. Reduce the boiling time by 20–30 seconds from package instructions to avoid overcooking. Rinse thoroughly under cold water after cooking to remove excess starch and to cool the noodles.
- Fermented kimchi – Slightly sour, well-fermented kimchi and some of its brine add essential umami and tang to the sauce. The dish is best with good-quality kimchi, but a milder or less fermented kimchi will work too.
- Bibim sauce – A combination of kimchi (and kimchi brine), gochujang (Korean chili paste), gochugaru (fine Korean chili flakes), soy sauce, vinegar (plum or rice vinegar), sesame oil, garlic, sugar, and crushed toasted sesame seeds. You can make extra sauce to store in the fridge, but omit garlic and sesame oil if storing for several days; add these fresh when ready to serve.
- Optional toppings – Thinly sliced cucumber, a hard-boiled egg, and additional crushed sesame seeds are traditional and highly recommended, though not strictly required.
Noodle choices
Somyeon (thin wheat noodles) is the classic choice for bibim guksu. Alternatives include naengmyeon (buckwheat and potato starch noodles) or soba. Naengmyeon is very chewy and has a different texture that some people love. If you don’t have any of those on hand, instant ramen noodles can work in a pinch—just be sure to cool them completely; this dish should be served cold.
Bibim sauce
If you don’t have kimchi or kimchi brine available, you can still make a flavorful bibim sauce. Replace the kimchi brine with extra soy sauce (about 2 tablespoons) and taste for acidity—add a bit more vinegar if you need the tang that kimchi brine would normally contribute. Adjust gochujang and sugar to achieve a balance of spicy, salty, and slightly sweet.
Storage and make-ahead tips
You can prepare a larger batch of the bibim sauce and keep it refrigerated. For the best flavor, leave out the raw garlic and sesame oil when storing the sauce for several days. Add those ingredients fresh just before assembling the noodles; garlic intensifies in storage and sesame oil can change character when mixed and stored for long periods.
Recipe Overview
This version serves about 2 people and takes approximately 13 minutes total (5 minutes prep, 8 minutes cook time). It’s a main-course Korean dish with a spicy, tangy profile. Below are the ingredient amounts and step-by-step instructions to make bibim guksu at home.
Ingredients (serves 2)
- 8 oz somyeon (thin wheat noodles)
- 1/2 cup fermented kimchi
- 3 tbsp fermented kimchi brine
- 1/4 cup gochujang (extra spicy or mild, to taste)
- 1 tsp fine gochugaru
- 3 tbsp sugar (any kind)
- 3 tbsp plum vinegar or rice vinegar
- 2 tbsp sesame oil (add fresh if storing sauce)
- 1 tbsp soy sauce (increase to 2 tbsp if no kimchi/brine)
- 2 garlic cloves (mince or press; add fresh if storing sauce)
- 2 tbsp crushed toasted sesame seeds
- Optional: hard-boiled egg and thinly sliced cucumber
Instructions
- Grind or crush toasted sesame seeds until about half become a fine powder and half remain slightly coarse for texture.
- Boil eggs to your preferred doneness and thinly slice the cucumber for topping.
- Whisk together kimchi brine, gochujang, gochugaru, soy sauce, sesame oil, minced garlic, vinegar, and half of the crushed sesame seeds until smooth. If you plan to store the sauce, omit the garlic and sesame oil and add them just before using. If you don’t have kimchi or brine, use 2 tbsp soy sauce and a little extra vinegar for tang.
- Stir the chopped kimchi into the sauce once the base is smooth and well combined.
- Cook somyeon noodles in boiling water for about 3½ minutes; watch closely because they cook very quickly. As a guideline, 4 oz of dried somyeon is a typical portion per person.
- Immediately drain the noodles and rinse thoroughly under cold running water to remove starch and cool them down. Rinse until the noodles are completely cold.
- Toss the cold noodles with the bibim sauce until evenly coated. This recipe yields enough sauce for 2–3 servings; adjust amounts to taste if you like it saucier or milder.
- Plate the noodles and top with the remaining crushed sesame seeds, sliced cucumber, and a halved hard-boiled egg. Serve chilled.
Additional notes
This recipe is flexible: tweak the heat by varying the amount of gochujang and gochugaru, adjust sweetness with sugar, and change acidity with more or less vinegar. Leftover sauce (without garlic and sesame oil) will keep for several days in the refrigerator. When storing, add fresh garlic and sesame oil just before serving for the best flavor.
Enjoy this quick, vibrant bibim guksu as a light main or a refreshing summer meal.