Web how long to cook a turkey crown most crowns will come with roasting instructions, so you can follow those, or if you’re unsure, calculate 20min per kg (2lb 5oz). Web rub 4 teaspoons salt mixture under skin of each breast half, 2 teaspoons salt under skin of each leg, and remaining salt mixture into cavity. Rub the turkey crown all over with the butter, season well with sea salt and black pepper and put any extra butter into the cavity with.