how long to cook butterfly chicken breast
Preparation. 1  Preheat your oven to 400 F. 2  Place the chicken, breast-side down, on a cutting board. 3  Cut along both sides of the backbone from end to end with kitchen shears and remove the backbone. 4  Flip the chicken breast-side up, and open it like a book. Pour the remaining fat/rosemary mixture over the vegetables and season to taste. 2  Place the baking sheet in the oven and cook for 1 hour or until a meat thermometer reads 165 F in the thickest part of the breast. 3  Remove chicken from oven, squeeze some lemon juice over it, and serve.