Roasting Bone-In Chicken: Fat Rendering and Skin Crisping

The technique of crisping chicken skin through fat rendering applies universally across culinary traditions — from Pépin's French roast chicken to Tsuji's Japanese yakitori to Ottolenghi's spice-marinated pieces. The physical principle is identical regardless of cultural context: subcutaneous fat must render completely before the skin can crisp; moisture must leave the surface before Maillard browning can begin. Jerusalem's recipes demonstrate this principle applied to bone-in pieces with spice marinades that add an additional technical challenge.

Bone-in chicken pieces marinated in spice, acid, and oil, roasted at high heat until the skin renders, crisps, and colours deeply. The marinade adds flavour but also moisture — the technical challenge is ensuring the surface dries sufficiently during roasting despite the marinade.

The crisped, spiced skin is the prize — it concentrates the marinade flavours through Maillard and caramelisation while the rendered fat carries those flavours into the meat beneath. A piece of properly roasted spiced chicken should be eaten skin-first to understand what the cook achieved.