Fresh wheat noodles dressed with a concentrated scallion oil — made by slowly frying spring onions (scallions) in neutral oil until they are deeply caramelised and almost crisp, straining off the oil (which is now deeply scallion-flavoured and coloured), combining the oil with dark soy sauce and sugar to produce a dark, sweet, intensely savoury dressing. Scallion oil noodles are a Shanghai standard — their simplicity (noodles, oil, soy sauce, spring onion) belies their depth, which comes entirely from the patience of the scallion-frying stage.
**The scallion oil:** - Spring onions (large quantity — 200g per 100ml oil): whole or large sections. - Neutral oil: 100ml. - Fry on medium-low heat — not high. The goal is slow caramelisation, not rapid frying. At low heat: the spring onions slowly release their moisture, shrink, and develop deep Maillard colour over 20–30 minutes. - At the correct endpoint: the spring onions are a deep amber-brown, almost crispy, significantly reduced in volume, and the oil around them is a rich golden-brown. - Strain, pressing the spring onions to extract all the oil. **The dressing:** Combine the scallion oil with dark soy sauce (for colour and sweetness) and a small amount of sugar. The ratio determines the saltiness and sweetness of the final noodle — taste and adjust. **The noodles:** Fresh Shanghai wheat noodles (round, approximately 3mm diameter). Boiled in vigorous water until just cooked. Drain. **The assembly:** While the noodles are still hot from the water: pour the scallion oil dressing over them. Toss immediately — the heat of the noodles warms the oil dressing and distributes it evenly. Top with a few of the fried scallion pieces. Decisive moment: The scallion colour — the 30-minute simmer that produces the deeply caramelised, almost crispy spring onion. At 15 minutes: the spring onions have softened and are beginning to colour but are still pale. At 25 minutes: deep amber, significantly reduced. At 30 minutes: the correct deep amber-brown with the specific sweet, caramelised onion smell that is the oil's entire flavour contribution. Sensory tests: **Smell — the scallion oil:** At the correct point, the straining of the scallion oil into a bowl releases an immediately complex smell: caramelised onion sweetness, the depth of extended Maillard reactions, a slightly smoky note from the highest-colour portions of the fried scallion. This smell is the flavour of the dressed noodle. **Taste:** Scallion oil noodles: deeply savoury from the dark soy and the caramelised scallion, slightly sweet, with the scallion's own sweetness amplified by the caramelisation, and a background warmth from the oil's temperature. Each noodle strand should taste of the oil.
Fuchsia Dunlop, *Land of Plenty* (2001); *Every Grain of Rice* (2012); *Land of Fish and Rice* (2016); *The Food of Sichuan* (2019)