Julia’s ultimate tip for the perfect roast chicken is to cook its sides as well as its back. The juices then run into the breast and leg, and the whole bird is flavoursome. In Mastering the Art of French Cooking, she suggests browning the chicken at around 220°C (425°F) for 15 minutes, back side up, then rotating it onto its left side for five minutes and onto its right side for five minutes, basting with every rotation. Next, lower the oven to 175°C (350°F) and keep the chicken on its right side.