Cantonese roast suckling pig — with its shatteringly crispy, bubble-textured skin — achieves the skin texture through a preparation fundamentally different from Western crackling technique: the skin is coated with an alkaline solution (a dilute vinegar-maltose mixture in some versions), pricked, dried overnight, and then roasted at very high temperature. The alkaline treatment and the complete surface drying are the key preparation stages.
- **Alkaline treatment of the skin:** A solution of baking soda or alkaline solution applied to the skin — the alkaline pH accelerates Maillard browning and produces the specific bubble texture as CO₂ is generated during roasting. - **The pricking:** Fine holes across the entire skin surface with a sharp fork — allowing sub-surface fat to escape during roasting rather than pooling and producing steam under the skin. - **Overnight drying:** The pig is hung or placed on a rack in a cold, airy environment for 12–24 hours — the skin must become paper-dry on the surface. - **High heat roasting:** 230°C+ for the initial phase. The skin blisters, bubbles, and achieves crackling.
China: The Cookbook