Before you cook
Background Recipe story & origin
Zaru soba (ざるそば) is a classic Japanese summer dish, though enjoyed year-round. The dish shows soba (buckwheat noodles) at their purest, served cold on a bamboo strainer (zaru) with a concentrated dipping sauce (tsuyu). Soba noodles have been eaten in Japan since at least the 17th century, originally as a food of Buddhist monks. The Edo period saw soba become a popular fast food, with specialized shops proliferating. Zaru soba is distinguished from mori soba by the addition of nori seaweed strips on top. The eating technique involves picking up a small bundle of noodles, dipping just the ends into the tsuyu (not submerging), and slurping loudly - the slurping aerates the noodles and is considered proper etiquette. After finishing, the starchy soba cooking water (sobayu) is traditionally poured into the remaining tsuyu and drunk as a nutritious finish to the meal.
Before you start Equipment you'll need
- large pot — Provides large volume of boiling water for cooking soba noodles quickly without overcrowding or sticking
Safety Safety & allergen notes
- Soba overcooks quickly; watch timing carefully.
- Ice bath must be very cold to stop cooking immediately.
- Tsuyu is concentrated; it's for dipping, not drinking.
Non-negotiables Rules for success
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Don't overcook the soba.
Soba should have firm bite; overcooked soba is mushy and starchy
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Rinse noodles thoroughly in cold water.
Rinsing removes surface starch for clean texture and prevents clumping
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Shock in ice water.
Ice bath stops cooking instantly and firms up the noodles
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Serve noodles well-drained.
Waterlogged noodles dilute the dipping sauce
Prep Get set first
About 6 min of prep
- Make mentsuyu (or use quality store-bought)
- Prepare ice bath
- Slice scallions thin
- Grate fresh wasabi or prepare tube wasabi
- Cut nori into thin strips
Zaru soba is all about the noodles. Use the best soba you can find and don't overcook them.
Ingredients
Instructions
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Make the tsuyu (dipping sauce)
Combine dashi, soy sauce, and mirin in a saucepan. Bring to a simmer. Add katsuobushi, remove from heat, and steep 5 minutes. Strain, pressing on bonito to extract flavor. Chill in refrigerator or over ice bath.
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Cook and chill soba
Bring a large pot of water to boil. Add soba noodles, stirring to separate. Cook according to package directions minus 30 seconds (usually 4 to 5 minutes total). Drain, reserving some cooking water (sobayu). Rinse noodles thoroughly under cold running water, rubbing gently to remove starch. Transfer to ice water bath for 1 minute. Drain very well.
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Top with scallions
Divide chilled soba among 4 plates or bamboo mats, twirling into neat piles. Top with nori strips. Pour tsuyu into small dipping cups. Place scallions, wasabi, and grated daikon on small side plates for adding to sauce. Serve immediately. Offer sobayu in a small pitcher for adding to remaining sauce at the end.
Chef's notes
Zaru means 'bamboo strainer' - the traditional serving vessel.
High-quality soba is made with 80-100% buckwheat flour.
The soba water (sobayu) is traditionally drunk with leftover tsuyu.
This is a popular summer dish but eaten year-round.