Sarashina Soba White Buckwheat Noodle

Ingredients

• 400 g Sarashina ichibangako (first-milled buckwheat endosperm flour), white, starch-rich, bran-free; not whole-grain soba flour
• 120 ml water, cold; added gradually
• For the tsuyu dipping sauce
• 400 ml dashi, light; kombu-forward preferred
• 60 ml soy sauce, light-style (usukuchi) or standard in restrained quantity
• 30 ml mirin, heated to burn off alcohol before combining
• Optional colour addition (one only, seasonal)
• 10 g matcha powder (cha soba), sifted; incorporated into dry flour before water
• 10 g dried sakura powder (sakura soba), for March service; sifted into dry flour
• 10 g dried yomogi (mugwort) powder (yomogi soba), for May service; sifted into dry flour
• 10 g dried yuzu zest, finely ground (yuzu soba), for winter service; sifted into dry flour

Method

1. 1
   Sift the ichibangako onto a clean work surface or into a wide mixing bowl. If using a colour addition, sift the chosen powder with the flour now, distributing it fully through the white flour before any liquid is introduced. The mixture must be uniformly pale or evenly coloured — any streaking at this stage will not resolve later.
2. 2
   Add the cold water in small increments, working it into the flour with the fingertips using a gathering motion. Sarashina dough is more fragile than whole-grain soba dough; handle it with minimal force. Stop adding water when the mass just coheres into a smooth, pliable dough that holds together without sticking or cracking. Overworking at this stage destroys the delicate structure the refined flour provides.
3. 3
   Wrap the dough and allow it to rest briefly so the starch hydrates evenly. Then roll it out on a lightly floured surface to an even, thin sheet — approximately 1–2 mm. The sheet should be uniformly pale and semi-translucent at the edges when held to light. Any grey-brown tint indicates bran contamination in the flour.
4. 4
   Fold the sheet carefully and cut into fine, even noodles of standard soba width. Shake off excess flour gently. The raw noodles should be pale — almost white — and uniform. Set aside on a board; do not allow them to sit long before cooking.
5. 5
   Bring a large pot of unsalted water to a full, rolling boil. Lower the noodles in and cook, stirring once to separate strands. Pale sarashina noodles can appear done before the flour interior has cooked through — taste to confirm there is no raw-flour quality at the centre. When just cooked, drain immediately and plunge into cold water, rubbing gently to remove surface starch. The noodle should be cool, firm, and clean to the touch.
6. 6
   Combine the dashi, soy sauce, and mirin (mirin heated first to burn off alcohol) in a small saucepan. Warm together briefly; the sauce should be light in colour, mild in sodium intensity, and faintly sweet. Do not reduce to a concentrated kaeshi — the robust sauce appropriate for whole-grain soba will overwhelm sarashina entirely. Cool before serving.
7. 7
   Arrange the drained noodles on a seiro (bamboo tray) set over dark lacquerware if available. The pale noodles against the dark surface is the correct presentation of the Sarashina tradition. Serve the tsuyu immediately alongside in a small cup. Sarashina must be eaten at once — it has less resting tolerance than whole-grain soba.