Velveting is a Chinese technique — standard in Cantonese and Sichuanese professional kitchens — that Western cooks rarely employ but that transforms stir-fry protein from rubbery and dry to silky and tender. López-Alt's documentation of the technique made it accessible to a Western audience and explained its mechanism, which had previously been transmitted only through apprenticeship.
A pre-treatment for proteins destined for stir-fry: the protein is coated in a mixture of egg white, cornstarch, and sometimes baking soda, then briefly blanched in water or oil before the main stir-fry. The coating creates a protective barrier that prevents the protein surface from toughening on contact with the wok's extreme heat.
- The cornstarch-egg white coating gelatinises on contact with heat, forming a semi-permeable barrier between the protein and the intense heat of the wok or oil - Baking soda (in the alkaline velveting variation) raises the pH of the meat's surface, which inhibits protein cross-linking during heating — producing a noticeably more tender texture [VERIFY: approximately 1/4 tsp per 450g protein] - Water blanching (the simpler method): bring water to a boil, add velveted protein, stir immediately to prevent sticking, remove when the exterior turns opaque (approximately 30–45 seconds). The protein finishes cooking in the wok - Oil blanching (the professional method): the same process in oil at 175–190°C — faster, produces a slightly different texture. Requires more oil than most home kitchens maintain for this purpose [VERIFY temperatures] - Velveted protein should be added to the wok at the last moment — it requires only seconds of additional cooking
SALT FAT ACID HEAT + THE FOOD LAB