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春卷Spring rolls

The crisp, rolled, deep-fried wrapper of the thin-and-flat family — a thin, uniform sheet rolled once over a shredded vegetable and stirred, seasoned meat filling, sealed on the last edge, and fried 2–3 min at the right temperature to glass and shatter. The whole dish is the 30–60 s of the roll and the 2 min of the fry — one tight roll, one clean fry, and the seal that holds it all together in the oil.

Origin: China, the pan-fried and deep-fried home and street versions both
Difficulty: 2 / 5
Servings: 4–6 (as a starter or a side)
Prep: 20 min
Cook: ~10 min
Total: ~30 min

Technique notes

A deep fry at the low-temperature window, with a thin, flat, rolled wrapper doing the holding. The wrapper is a continuous sheet, not a pinched seam, and its strength comes from being a single, unbroken surface that the one roll, one wrap moves the seal to. The thinness of the skin is what lets the surface set and crisp before the filling's heat boils it from the inside, and the 2–3 min fry is the ±30 s window. The filling is the marinate half of the dish — a little salt and acid on the meat, a little fragrance from the scallion and the garlic — and the thin-cut of the vegetable is the one that sets the 2 min fry. The stir-fry is the same dish with the wrapper left out, and the mapo tofu is the same filling with the tofu in the middle, and the jiaozi is the same filling in a pinched skin instead of a rolled one.

Equipment

A deep, heavy pot or a Dutch oven — enough for 1 l (4 cups) of oil, the deep-fry setup
A candy/fry thermometer — the 170–175 °C ( 340–350 °F) window is the whole job of the oil
A flat, non-slip surface and a small offset spatula, for the one roll and the seal
A fine sieve, for the oil

Ingredients

The filling
200 g (7 oz) shredded pork shoulder, or a 200 g of the firm tofu, cut 5 mm dice
1 (150 g) Chinese (or baby) cabbage, shredded 5 mm wide, the thin-cut of the vegetable
100 g (a handful) enoki or shiitake, the ends trimmed, and 5 mm sliced
2 (10 cm) scallions, sliced 5 mm
5 g (1 clove) garlic, minced
10 ml (2 tsp) light soy sauce — the salt
5 ml (1 tsp) sesame oil — the fragrance
3 g (½ tsp) white pepper
The wraps and the fry
24 (500 g) thin, round or square spring-roll wrappers ( thin-and-flat family, the 20 cm square), the dough that holds the thinness
1 (100 g) egg, beaten — the seal wash on the last edge
1 l (4 cups) vegetable oil — for the deep fry
The dipping sauce
60 ml (4 tbsp) sweet soy sauce, or 40 ml of light soy mixed with 20 g of brown sugar and 10 ml of vinegar

Method

The filling, seasoned. Combine the shredded pork (or the diced tofu), the shredded cabbage, the mushrooms, the scallion, and the garlic. Into the mix, the 10 ml of soy, the 5 ml of sesame oil, and the 3 g of white pepper, and stir to a single, even, slightly sticky mass. This is the marinate half of the dish, and the salt of the soy is the edge that the thinness of the wrapper is about to carry. The 5 mm cut of the vegetable is the one that sets the 2 min fry — a 2 cm slice will sit in the oil and stay raw in the middle.
The one roll, and the seal. Work with one wrapper at a time, and the rest under a damp cloth so they don't dry out and crack. Lay a wrapper on a flat surface, and into the center, a 30–40 g of the filling in a loose, thin line. Fold the edge nearest you up over the line, and pinch it shut, and fold the left and right edges in, and one long roll from that edge to this one. On the last 2–3 cm of the roll, brush a little of the beaten egg, and pinch the seam shut against the roll, so the seal is a double-thickness bead. The one roll, one wrap, one seal is the thin-and-flat family, and the 30–60 s is the ±15 s window. If the seam unseals before it hits the oil, the roll was loose, or the egg wash was skipped, and the one roll is the one that holds it together in the oil.
The fry. Into the unheated pot, the 1 l of oil, on a medium flame, and bring it to 170–175 °C (340–350 °F) — the low-temperature window, and the one that sets the surface of the wrapper and crisps it, without burning it. Working in small batches of 3–4, so the temperature holds, lower each one in and fry 2–3 min, turning once, until both sides are a deep, even gold and the edge is crisp. The 2 min is the ±30 s window — a spring roll in the oil past 3 min is a greasy, oily skin that soaks instead of crisping, and one pulled out at 1 min is a raw, weepy wrapper that will tear the moment it meets the dip.
Drain, and the dip. Tip the rolls out onto a wire rack or a paper towel, and a few minutes to drain. The low-temperature window is the one that keeps the oil from soaking, and the rack is the one that keeps the bottom from going soft. A few drops of the sweet soy, or the salt–acid–sweet mix, in a small bowl on the side. Eat the rolls hot, in a loose pile, with the crisp edge showing.

Common failures

Crisp outside, weepy inside. The filling was too wet, or the vegetable was cut too thick ( past 5 mm, step 1), so the surface set before the interior could drain its water out. The thinness of the skin is what decides whether it can hold the filling's water, and a 2 cm slice of vegetable is the one that stays raw and weepy in the middle.
The roll unseals in the oil. The last edge wasn't locked (step 2), or the roll was too loose. One tight roll, the egg wash on the last 2–3 cm, and a 1 min rest before the fry, so the seal sets. The one roll, one wrap, one seal is the thin-and-flat family, and the 30–60 s is the ±15 s window.
Greasy, oil-heavy rolls. The oil was under 170 °C (340 °F), or the rolls were fried in too many at a time, so the temperature dropped and the wrapper soaked the oil before it set. The low-temperature, one-at-a-time logic: the oil should hold the 170–175 °C window, and the rolls should be fried in small batches so it does.
A hard, dry shell with a cold filling. The skin was too thick for the fill, so the surface set and then dried out while the interior was still catching up. Thinner skin ( the thinness), or a filling with less water in it, and the 2–3 min fry is the ±30 s window, not a 5 min one.
The roll is gummy, not shattery. The wrapper was a thick, leavened skin (the scallion pancake family) instead of the thin-and-flat one, so it set to a chewy, dense surface instead of a crisp one. The thinness is the one that gives the low-temperature fry its browning, and a thick wrapper is the one that soaks instead of crisping.

Variations & substitutions

The "mapo" filling. Swap the pork for the mapo tofu family's silken tofu, and the same one roll, the same low-temperature fry, the same salt-and-depth — the mapo's heat is the top note of the filling, and the thinness of the wrapper is the one that carries it.
The "shrimp" half. A few large, peeled, 5 mm-diced prawns in the filling, with the same marinate logic, and the same fry window. The shrimp is the clear edge against the salt of the pork and the sweet of the cabbage, and the thinness of the wrapper is the one that lets all three come through the low-temperature window.
A little more of the "sweet soy" dip. Bump the dipping sauce to a 2:1 ratio of sweet soy to water, and the roll reads as a sweet-and-salty snack rather than a savory starter — the same balance, the sweet-and-salt edge shifted toward the sweet.

What to serve with it

This is the "starter" of the section — the one that comes before the hot pot, or the mapo tofu, or the hong shao rou (the braised, marinated pork belly, the wok-heat of the section). It pairs with anything that's a light, fresh, sharp plate to set the edge against the fry of the roll: the som tum (the raw, pounded, the salt–acid–sweet) is the "cut" against the fry of the roll. And the hot pot is there for the people who want the simmer of the broth against the fry of the starter.

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