Zaru Soba Recipe
James Carter
| 10-11-2026
· Cate teamZaru soba is a popular Japanese noodle dish made with chilled buckwheat noodles, shredded roasted seaweed, and a savory dipping sauce. Unlike warm noodle soups, this dish is served cold, making it a refreshing choice for lunch or dinner, especially during warmer weather.
The noodles have a pleasant nutty flavor and a firm texture, while the dipping sauce adds a rich, savory taste. With a few simple ingredients and straightforward cooking steps, we can prepare this traditional-style dish at home in approximately 15 minutes.
What Is Zaru Soba?
Zaru soba features cooked buckwheat noodles that are rinsed, chilled, and served separately from their dipping sauce. Each portion is dipped into the sauce just before eating. Thinly sliced green onions, wasabi, and roasted nori add extra flavor and texture.
Preparation and Cooking Time
- Preparation Time: 5 minutes
- Cooking Time: 10 minutes
- Total Time: 15 minutes
- Servings: 2
Ingredients
For the Noodles:
- 200 g dried soba noodles
- 2 tablespoons shredded roasted nori seaweed
- 1 green onion, approximately 15 g
- 1 teaspoon wasabi
- 1 large bowl of ice water
For the Homemade Dipping Sauce:
- 3 tablespoons soy sauce (45 ml)
- 3 tablespoons sweet rice seasoning (45 ml)
- 3 tablespoons water (45 ml)
- 1/2 cup dried bonito flakes (approximately 5 g)
- 2/3 cup water (160 ml)
Step 1: Prepare the Ingredients
Measure all ingredients before cooking. Wash the green onion and slice it into thin rounds. Place the dried noodles nearby and prepare a large bowl of ice water for chilling later.
Step 2: Make the Dipping Sauce
Combine 45 ml of soy sauce, 45 ml of sweet cooking sauce, and 45 ml of cooking seasoning in a small saucepan. Add 5 g of dried bonito flakes and stir gently.
Heat over medium heat until the mixture boils. Let it boil for approximately one minute, then turn off the heat. Allow it to cool slightly before straining through a fine sieve to remove the bonito flakes.
Add 160 ml of cold water and stir well. Transfer the sauce to a serving bowl and let it cool completely.
Step 3: Cook the Soba Noodles
Bring approximately 2 liters of water to a rolling boil in a large saucepan. Add 200 g of dried soba noodles gradually, stirring gently to separate the strands.
Cook for approximately 3–4 minutes, or follow the package instructions. Stir occasionally to prevent sticking. The noodles should be tender but retain a slightly firm texture.
Step 4: Rinse and Chill the Noodles
Drain the cooked noodles in a colander. Rinse thoroughly under cold running water, gently separating the strands with your fingers to remove excess starch.
Transfer the noodles to the prepared ice water and chill for 2–3 minutes. Drain again and shake the colander gently to remove excess water. This helps prevent the dipping sauce from becoming diluted.
Step 5: Arrange the Noodles and Toppings
Divide the chilled noodles equally between two serving plates. Sprinkle 1 tablespoon of shredded roasted nori over each portion.
Place the sliced green onion and wasabi in small serving dishes. Divide the cooled dipping sauce between two individual bowls.
Step 6: Serve and Enjoy
Serve the noodles immediately while they are cold. Pick up a small portion and dip it into the sauce before eating. Add green onion or a little wasabi according to your preference.
Keep the noodles separate from the sauce until serving to maintain their firm texture and refreshing temperature.
Helpful Cooking Tips
Avoid overcooking the noodles, as excessive boiling can make them soft. Rinsing them thoroughly is equally important because it removes surface starch and helps keep the strands separate.
Drain the noodles well after chilling. Too much water can weaken the dipping sauce's flavor. For convenience, you can also use prepared men-tsuyu sauce mixed with cold water instead of making the dipping sauce from scratch.
Final Thoughts
Zaru soba is an easy Japanese noodle dish that combines chilled buckwheat noodles with a savory sauce and simple toppings. By preparing the sauce first and carefully cooling the noodles, we can create a refreshing meal with balanced flavors. It is a practical recipe for a light lunch or a relaxed homemade dinner.
Zaru Soba Recipe | Best of Japanese Cooking 101
Video by JapaneseCooking101