The problem is that chicken breasts dry out if cooked beyond 150°F (66°C) or so, but legs need to come up to 175°F (80°C). Spatchcocking, or butterflying, is the solution: By flattening out the chicken, you expose its legs to higher heat, helping them cook a little faster than the breasts—which is exactly what you want for juicy meat. It also yields crisper skin and a much faster cooking time than traditional roasting. In and out of the oven in 45 minutes or less!