Thick, white, chewy wheat flour noodles — the characteristic Japanese noodle of the cold noodle (zaru udon) and hot broth (kake udon) traditions. Udon's defining characteristic is its texture: a combination of chewiness (from the developed gluten network) and smoothness (from the kneaded dough surface) that no commercial dried udon fully replicates. Sanuki-style udon (from Kagawa prefecture) is the benchmark — extremely thick, extremely chewy, with a surface smoothness that creates a distinctive slipping sensation when slurped.
**The dough:** - High-protein bread flour (or a blend of all-purpose and bread flour): higher protein content produces more gluten, which provides the characteristic chew. - Salt: 2 teaspoons per 300g flour — dissolved in the water before adding. Salt strengthens the gluten network (by promoting disulfide bonding between gluten proteins) and is an essential structural component, not merely a flavouring. - Water: approximately 43–45% of flour weight (130–135ml per 300g flour). The dough should be stiff — stiffer than pasta dough. **The kneading — the foot method:** Traditional Sanuki udon is kneaded by foot (ashi fumi) — the dough placed in a cloth bag and kneaded by the weight of the body stepping across it repeatedly for 10–15 minutes. The foot provides the large, even pressure that develops the gluten network uniformly across the entire dough mass. Hand kneading (10–12 minutes of vigorous kneading) is the home alternative. **The resting:** The dough rests wrapped for minimum 1 hour at room temperature (30 minutes minimum for hand-kneaded dough). This rest: the gluten network relaxes (making rolling easier) and the salt-water equilibrates evenly through the dough. **The rolling and cutting:** Roll to 3–4mm thickness. Fold loosely. Cut into strips 3–4mm wide (for Sanuki-style thick udon) or 6–8mm wide. **The boiling:** A very large pot of actively boiling water — at least 3 litres per 100g of fresh noodles. Fresh udon: 10–12 minutes at a rolling boil. Drain thoroughly and rinse in cold water (which stops cooking and removes excess starch from the surface, producing the characteristic smooth surface). Decisive moment: The gluten development during kneading — assessed by the window pane test: stretch a small piece of dough between the fingers. Fully developed gluten: the dough stretches into a thin, translucent sheet without tearing. Under-developed: tears immediately.
Tadashi Ono & Harris Salat, *Japanese Soul Food* (2013)