In the siu mei (燒味) roast meats tradition of Cantonese cooking, the three pillars are char siu (BBQ pork), siu ngap (roast goose), and siu yuk (crispy pork belly). Each occupies a different flavor and texture register: char siu is sweet, marinated, and tender-chewy; siu ngap is mahogany-lacquered, richly fatty, skin-crispy over juicy dark meat; siu yuk is pure textural contrast — the meat is seasoned but relatively straightforward, and the entire value of the dish is the crackling skin.
The crackling is the product of a specific sequence. The common failure of home attempts at siu yuk is soft skin — either not dried enough, not hot enough, wrong preparation technique, or all three. The skin must be:
- Scored — a tight crosshatch pattern cut through the skin and just into (but not through) the fat layer, which allows the blistering to happen at multiple points
- Dried — all surface moisture removed by an overnight air-drying period (the fat and protein need to be relatively dry for the blistering to work)
- Coated with an alkaline agent — baking soda or baking powder on the skin surface raises the pH of the skin proteins, which promotes Maillard browning and the bubble-formation mechanism during high-heat roasting
The vinegar is applied first (acid), then baking soda (base) — the two react mildly; the carbon dioxide they produce is what creates the bubbles in the crackling. Some recipes use only one agent; both together work better.
The Siu Mei Three-Way Difference
| | Siu Yuk | Char Siu | Siu Ngap | |---|---|---|---| | Cut | Pork belly, skin-on | Pork shoulder or neck | Whole goose | | Flavor | Five-spice, savory | Sweet marinade (honey, hoisin) | Five-spice, complex cavity stuffing | | Skin | Shattering crackling | No skin | Lacquered crispy skin | | Color | Golden-mahogany skin / pink meat | Red-caramelized exterior | Deep mahogany | | Texture | Crispy skin / juicy fatty meat | Tender-chewy, slightly sticky | Crispy skin / rich dark meat |
The Complete Recipe
Serves: 4–6 | Time: 2 days (including overnight drying)
Ingredients
- 1kg pork belly, skin-on, in one piece (ideally with 5 layers visible)
Meat-Side Seasoning
- 1.5 teaspoons five-spice powder
- 1 teaspoon white pepper
- 1 teaspoon salt
- 1 teaspoon Shaoxing wine
- 1 teaspoon soy sauce
Skin Treatment
- 1 tablespoon rice vinegar (or white vinegar)
- 1 teaspoon baking soda (bicarbonate of soda)
- 1 teaspoon fine salt
Method
Day 1 — Prepare:
1. Score the skin: Using a sharp fork, skewer, or thin knife, score the skin in a crosshatch pattern — cuts approximately 1cm apart in both directions, through the skin and very slightly into the fat beneath. Do not cut into the meat layer. The more scores, the better the crackling coverage.
2. Blanch (optional but recommended): Place pork belly skin-side down in a pan of cold water; bring to a boil; simmer 5 minutes; remove; pat completely dry. (Blanching removes residual moisture and blood, helping the skin dry properly.)
3. Season meat side: Combine five-spice, pepper, salt, Shaoxing wine, and soy sauce; rub into the meat side and sides only — do NOT get any on the skin.
4. Treat skin: Stand the pork belly skin-side up. Brush vinegar evenly over the skin; allow to absorb briefly. Mix baking soda and fine salt; spread the mixture evenly over the skin surface.
5. Air-dry: Place pork belly skin-side up on a wire rack; refrigerate uncovered overnight (minimum 8 hours, ideally 24 hours). The skin should feel dry to the touch and slightly firm before roasting.
Day 2 — Roast:
6. Preheat oven to 220°C. Place pork belly skin-side up on a wire rack set over a baking tray. The rack is important — it allows fat to drip away rather than pooling and steaming the skin.
7. Roast: Roast at 220°C for 30–35 minutes until the skin has fully blistered (you will hear crackling sounds — a good sign). If after 35 minutes the skin is not fully crackling, raise the oven to maximum or use the broiler/grill element for 3–5 minutes, watching closely. The skin can go from perfect to burnt quickly.
8. Rest: Rest 10 minutes before carving.
9. Carve: Cut into strips and then into bite-sized pieces through the skin — a cleaver through bone or a sharp knife through the skin is more effective than a standard knife.
Serve: With white rice, a dipping sauce of sweet soy sauce, and mustard or plum sauce.
Related reading: Char Siu Cantonese BBQ Pork Guide | Cantonese Roast Goose Siu Ngap Guide | Crispy Pata Filipino Pork Knuckle Guide
The full recipes live in the book.
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