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Japanese · Uji, Kyoto

Cha Soba Green Tea Noodle Buckwheat Blend Spring

Cha soba (tea soba) incorporates finely ground matcha green tea powder into buckwheat noodle dough, creating a pale green noodle with the earthy-grassy character of green tea layered over the nutty buckwheat base. The technique is primarily associated with Uji in Kyoto Prefecture—the center of premium matcha production—where the local green tea culture naturally extended into noodle production. Matcha is typically incorporated at 3-8% of flour weight, a quantity that contributes visible green color and a distinct tea fragrance without overwhelming the buckwheat's natural character. The tea's tannins interact with the buckwheat starch, creating a slightly different gluten behavior that requires slight adjustment in water ratio. Cha soba is served predominantly cold (zaru style), as chilling intensifies the matcha fragrance and complements its astringent character. The noodles' green color fades slightly during and after cooking due to oxidation of the chlorophyll—this is normal and not a defect. The dipping tsuyu accompaniment for cha soba is the same as standard soba but the interplay of tsuyu's smokiness against matcha's vegetal character creates a distinctive pairing. Cha soba's Spring and summer associations (green color, light-feeling preparation) make it a seasonal specialty despite year-round availability.

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ServesFour portions
Sourced0of 7 in BC
Cook
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I

The Market List

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For the dough
300 g
buckwheat flour (soba-ko)
Not yet stocked in British Columbia
18 g
matcha powder, cooking grade or above
mixed to a smooth paste with a small amount of cold water before use; 6% of flour weight
Not yet stocked in British Columbia
150 ml
cold water
adjusted slightly upward if dough appears dry—matcha tannins alter hydration behaviour
Your own market
For the tsuyu dipping broth
200 ml
kaeshi
Not yet stocked in British Columbia
400 ml
dashi
cold
Not yet stocked in British Columbia
To serve
1 tsp
wasabi
freshly grated or paste; presented separately
Not yet stocked in British Columbia
2
spring onions
finely sliced
Your own market
II

The Method

1
Combine the matcha with a small amount of the measured cold water and work to a smooth, lump-free paste. Add this paste to the buckwheat flour and incorporate the remaining cold water gradually, working the dough until it just coheres. If the dough appears dry or cracks at the edges—a sign that the tea tannins are tightening the starch—add water in small increments. The dough is ready when it holds together without sticking and the surface is smooth.
From the canon — Matcha (抹茶) — finely stone-ground powdered green tea from shade-grown tencha leaves — extends far beyond the tea ceremony context into Japanese cooking and c… Matcha — Culinary Applications Beyond the Tea Ceremony (抹茶料理) →
2
Roll the dough to an even sheet of approximately 2 mm. Fold and cut into noodles of standard soba width. Work efficiently: the matcha's chlorophyll begins to oxidise and the colour to fade from the moment the dough is exposed to air. Uniform thickness is the test—hold a cut bundle to the light; the strands should be consistent in translucency.
3
This is where the dish lives or dies. Bring a large volume of unsalted water to a full rolling boil and cook the noodles briefly—fresh cha soba requires only 60–90 seconds. Drain immediately and transfer at once to a bowl of iced water to shock. The noodles must be chilled through: a strand lifted and pressed between thumb and forefinger should feel cold to the core and give a clean, resilient bite. Cold service is not optional; heat suppresses the matcha fragrance that defines the dish.
4
Drain the shocked noodles thoroughly and arrange on a zaru (bamboo draining tray) or a chilled plate. The colour will have shifted from vivid green to a more muted, slightly yellowed green—this is the expected result of chlorophyll oxidation during cooking and is not a defect. Serve immediately; cha soba deteriorates in fragrance faster than plain soba.
5
Combine the cold dashi and kaeshi to form the tsuyu. Serve in a small cup alongside the noodles with wasabi and sliced spring onion on the side. Taste the tsuyu: its smoky depth should read as a clean contrast to the vegetal, astringent character of the noodles—neither element should overwhelm the other.
III

Quality Hierarchy

01
Reserve — Ceremonial-grade Uji matcha, stone-ground from shade-grown tencha; hand-cut noodles from single-origin buckwheat; house-made tsuyu from first-press katsuobushi dashi.
02
Estate — Premium cooking-grade Uji or Nishio matcha with complex, non-bitter character; careful dough proportion at 6–8% matcha; tsuyu made from quality dashi and kaeshi rested overnight.
03
Market — Standard cooking-grade matcha (not the lowest culinary tier); reliable buckwheat flour; commercially prepared tsuyu concentrate adjusted to taste.
04
House — Low-grade culinary matcha: — this as a common mistake—flavour and fragrance are significantly diminished and the dish loses its defining tea character.
IV

Sensory Tests

◇Touch. Dough holds together without sticking and the surface is smooth and cohesive; no cracking at edges.
◇Sight. Cut noodles are uniform in width and thickness; a lifted bundle shows consistent translucency across all strands.
◇Touch. After ice-water shock, a noodle pressed between thumb and forefinger feels cold to the core and gives a clean, resilient bite with no soft centre.
◇Smell. Chilled noodles carry a discernible green-tea fragrance; if the aroma is absent, the noodles have been held too long and should be served without further delay.
◇Where it lives or dies. The dish is decided at the cook: the noodles must be shocked immediately in iced water and served cold, as heat suppresses the matcha fragrance that is the dish's defining character.
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VI

What to Pour

The pairing
Nikka From The Barrel
Nikka Whisky — Miyagikyo Distillery · Miyagikyo — Nikka Distillery
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Whisky
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The whole pairing
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