Dry-heat cooking · beginner

Roasting

Also: oven-roasting

Cooking food uncovered in hot, dry oven air so the outside browns while the inside cooks through.

What it is

Roasting surrounds food with hot air in an oven, usually uncovered and often on a rack or tray, so the surface dries, browns and crisps while heat travels slowly to the centre. It is used for whole joints, poultry, root vegetables and anything that benefits from a browned exterior and a juicy interior.

Why cooks use it: Dry heat browns the surface, concentrating flavour through the Maillard reaction and caramelisation, while the oven's even heat cooks large pieces without constant attention.

The science

Hot air transfers heat mainly by convection and radiation from the oven walls. The surface must lose its water before it can climb above 100 °C, which is why dry surfaces brown faster. Inside, proteins set and fats render as the core temperature rises.

How heat moves into food The Maillard reaction Caramelisation How proteins set when cooked Moisture and texture Food-safety temperatures

Step by step

Preheat the oven fully (usually 190–220 °C for vegetables and poultry; lower for large joints).
Pat the food dry, season with salt and coat lightly in oil or fat.
Spread it in a single layer with space around each piece, or set a joint on a rack in a roasting pan.
Roast, turning vegetables once halfway so all sides touch the hot tray.
Check meat with a probe thermometer in the thickest part, away from bone.
Rest joints and poultry loosely covered for 10–20 minutes before carving.

Heat and timing

Roasting 160–230 °C · 160–180 °C for large joints and slow roasts; 200–230 °C for vegetables and quick browning.

Time: 20–45 minutes for vegetables; about 1–1.5 hours for a 1.5–2 kg chicken; several hours for slow-roast shoulders.

How you know it’s right

Edges browned and crisp, not pale
Fat sizzling in the pan
Juices of poultry run clear and the probe reads 74 °C in the thickest part
Vegetables tender to a knife tip

Common mistakes

Crowding the tray so food steams instead of browning
Skipping the preheat
Putting wet vegetables straight in
Carving immediately without resting

Troubleshooting

Vegetables pale and soggy: Use a larger tray or two trays, raise the heat and dry the pieces before oiling.
Outside dark, inside undercooked: Lower the oven by 20–30 °C, tent with foil and continue until the core temperature is reached.
Meat dry: Pull it 3–5 °C below the target (it rises while resting) and rest before slicing.

Restaurant DNA

How professionals do it

Restaurant kitchens often sear proteins on the stove first, then finish in a hot oven, and use probe thermometers rather than timings. Combination ovens let them add controlled steam for joints and dry heat for crisping.