Hong Shao Yu: Chinese Red-Braised Fish in Sweet Soy and Black Vinegar

Score the fish: use a sharp knife to make 2–3 diagonal cuts on each side of the fish, cutting through the skin and about 1 cm into the flesh. The cuts should angle toward the head and be spaced evenly along the thickest part of the body. Scoring allows even heat penetration and sauce absorption — without it, the thick middle stays undercooked while the tail is done.

Dry the fish aggressively. Pat every surface — inside the cavity, the skin on both sides, the scored cuts — with paper towels until there is no visible moisture. This step is non-negotiable: wet fish steams instead of sears, the skin sticks, and the crust never forms. Refrigerate uncovered for 5 minutes if you have time — the air-drying helps further.

Dust the fish: sprinkle the cornstarch evenly over the skin on both sides and rub it gently into the scored cuts. You want a thin, even coating, not thick clumps. Shake off any excess. The cornstarch protects the skin during searing and will thicken the sauce later as it bleeds into the braising liquid.

Set a wok or large skillet (at least 30 cm) over medium-high heat until it just begins to smoke. Add the neutral oil and swirl to coat. Add the rock sugar and stir for 60–90 seconds until it melts and turns amber — watch closely, as it moves from golden to burnt quickly. The oil will begin to foam around the sugar as it caramelizes; this is the color and gloss base for your sauce.

Add the ginger slices, smashed garlic, and the white parts of the scallions. Stir-fry for 60 seconds until fragrant and just beginning to color. These aromatics bloom in the caramelized sugar and fat, forming the foundation of the braising liquid.

Lay the fish flat in the wok — lower it in gently away from you to avoid oil splatter. Let it sear completely undisturbed for 3–5 minutes over medium heat until the underside is deep golden and the fish releases cleanly when you attempt to move it. If it resists at all, wait another minute. Flip carefully using a wide spatula and a second spatula or spoon to support the head end. Sear the second side for 2 minutes.

Pour in the Shaoxing wine along the edges of the wok — it will sizzle and steam. Add the light soy sauce, dark soy sauce, and water. The liquid should come roughly one-third up the sides of the fish, not submerge it. This is a glaze-braise, not a stew. Bring to a simmer.

Reduce heat to medium-low and braise for 8–10 minutes, spooning the braising liquid continuously over the exposed top of the fish every 60–90 seconds. This basting is the key to building the glaze — the top of the fish must be coated repeatedly or it will look pale and taste flat. As the liquid reduces, it will thicken and deepen in color.

In the final minute, taste the sauce — it should be savory, sweet, and slightly syrupy. If it's reducing too fast, add a splash more water. When the sauce clings to a spoon and the fish is cooked through (the flesh at the score marks should flake easily), you're ready for the vinegar.

Add the Zhenjiang black vinegar now, pouring it around the edge of the wok. Swirl the pan once to distribute it through the sauce but do not cook further — 15–20 seconds maximum. The black vinegar's volatile acidity and complex aged notes are entirely destroyed by sustained heat. This is the moment that makes the dish: the sauce should immediately smell brighter and more aromatic.

Transfer the fish carefully to a serving platter — use two wide spatulas and support the whole fish from underneath so it doesn't break. Pour the remaining sauce over the fish. Scatter the green scallion tops over the top. Serve immediately with steamed white rice. Do not flip the fish on the plate.