Cong You Bing — Chinese Scallion Pancakes with Shatteringly Flaky Layers

Tap a step’s number to check it off as you go.

1. 1

   Put the flour and 1/2 tsp salt in a large bowl. Pour the boiling water over about half the flour and stir hard with chopsticks or a wooden spoon until that side is a shaggy, scalded mass. Then add 75 ml cold water to the dry side and stir until everything comes together into a rough dough.

   Why: This is *ban tang mian* — half-scalded dough — and it is the single biggest decision in the recipe. Boiling water denatures the gluten proteins so they can no longer form a strong elastic network, and it gelatinises some of the starch, which holds water. That half of the dough is tender, soft and, crucially, does not spring back when rolled. The cold-water half keeps enough intact gluten to give the pancake chew and to stop the thin laminated sheets tearing. All boiling water gives you something fragile that falls apart; all cold water gives you a dough that recoils every time you roll it and layers that stay leathery.

2. 2

   Tip the dough onto a lightly floured surface and knead for 4–5 minutes, until smooth and soft — the texture of an earlobe. Add the last 10 ml of cold water if it feels dry and stiff. Wrap in cling film or cover with an upturned bowl and rest for 30 minutes at room temperature.

   Why: The rest is not optional and it is not about flavour. Kneading tightens the gluten that survived the scalding; thirty minutes lets it relax so that later you can roll a piece of dough out to a paper-thin 30 cm sheet without it shrinking back or splitting. Skipping the rest is the reason home scallion pancakes end up thick and bready — you simply cannot get the dough thin enough, and thin is what makes layers.

3. 3

   Meanwhile, make the oil roux. Warm the 60 ml oil in a small pan over a low heat until it shimmers but is nowhere near smoking, then take it off the heat and whisk in the 45 g flour, 3/4 tsp salt and the white pepper. It should be a loose, pourable paste, like double cream. Set it aside to cool to room temperature.

   Why: This is *you su*, and swapping it for plain brushed oil is the difference between a flaky pancake and a greasy one. Loose oil has nowhere to go under a rolling pin — it squeezes out at the edges, pools on the worktop and leaves the dough sheets touching each other, which is to say fused. Suspending the fat in flour turns it into a paste that stays exactly where you spread it, forming a continuous barrier film between every layer. It is the same job butter does in a croissant, minus the chilling, because a paste doesn't need to be solid to stay put.

4. 4

   Divide the rested dough into 4 pieces. Keep three covered. Roll the first out on a lightly floured surface into the thinnest rectangle you can — aim for about 30 x 20 cm and genuinely translucent in patches. If it starts to fight you, leave it for two minutes and come back.

   Why: Layer count is a straight function of thinness: the sheet you roll now becomes 15 or 20 stacked sheets after rolling and coiling, and if it starts at 2 mm it finishes as a dense spiral. Fighting a recoiling dough is always a signal to wait rather than push — gluten relaxes on its own clock, and two minutes of patience is faster than tearing the sheet and starting again.

5. 5

   Spread a quarter of the oil roux over the whole sheet with the back of a spoon, right to the edges. Scatter a quarter of the sliced spring onions evenly over the top — evenly and not too thickly.

   Why: Two things are going on. First, the salt is in the roux rather than sprinkled on the onions on purpose: salt sitting directly on cut scallion draws water out within minutes, and that water turns to steam in the pan, blows holes through the thin layers and makes the seams unstick. Second, a heavy carpet of scallion physically prevents the dough sheets from bonding at all, and the pancake unravels in the pan. Restraint here looks wrong and tastes right.

6. 6

   Roll the sheet up tightly from the long edge into a rope, as you would a swiss roll, then stretch the rope gently to about 45 cm. Coil it into a flat spiral like a snail shell, tuck the loose end underneath, and press down lightly to a thick disc. Repeat with the remaining three pieces, then rest all four coils, covered, for 10 minutes.

   Why: Rolling the sheet gives you concentric layers; coiling that rope and then flattening it turns those concentric rings into dozens of stacked spirals, which is where the shattering flakiness comes from. Stretching the rope before coiling multiplies the count again. The 10-minute rest matters for the same reason as the first one — a tightly wound coil is under tension, and rolling it out immediately squeezes the roux straight through the dough.

7. 7

   Roll each coil out into a round about 20 cm across and 5 mm thick. Use a light hand and go from the centre outwards, turning rather than pressing hard. A little roux weeping through is fine; a torn sheet is not.

   Why: Heavy pressure at this stage welds the spirals back into a single mass and undoes everything the lamination achieved. You are persuading the coil to spread, not crushing it flat. Five millimetres is the sweet spot: thinner and the layers merge into a crisp cracker, thicker and the centre stays doughy in the time the outside takes to brown.

8. 8

   Heat 1 tbsp oil in a heavy frying pan over a medium heat. Lay in one pancake and fry for 3 minutes, until the underside is golden with dark blistered spots. Flip, add another 1/2 tbsp oil round the edge, and fry 2–3 minutes more. Then cover the pan with a lid for 1 minute, uncover, and give each side a final 30 seconds to re-crisp.

   Why: Medium heat, not high: the pancake needs long enough for the roux between the layers to melt out and effectively shallow-fry each sheet from the inside, which is what crisps them individually. High heat browns the outside in ninety seconds and leaves the middle raw and pasty. The minute under the lid is the street-stall trick — trapped steam inflates the layers and pushes them apart, and the final uncovered thirty seconds drives that moisture back off so you keep the crunch.

9. 9

   Slide the pancake onto a board. While it is still hot, clap it lightly between your palms or push in from opposite edges two or three times, so the layers visibly loosen and fluff apart. Cut into six wedges and eat straight away, while the rest fry.

   Why: This is *tui su* — 'pushing the flakes' — and it is what stall cooks do instinctively before handing the pancake over. Compressing the disc briefly fractures the layers along their seams so they separate into distinct flakes instead of staying a solid round. It takes two seconds and transforms the texture.

10. 10

    Stir the dipping sauce ingredients together in a small bowl and serve alongside.

    Why: The pancake is fatty, salty and starchy; the sauce is there as the acid counterweight, which is why black vinegar rather than more soy is doing the real work. Add it at the table, not to the pancake — a dipped corner stays crisp, a dressed pancake goes soft in under a minute.