If you are cooking for 4 or less people, a turkey breast will give you the perfect amount of food with a little left over! Ideal for small families or anyone looking for a quicker way to cook the bird. Cooking a breast also helps eliminate the juggling of cooking dark and light meat. According to the USDA, white meat will start to dry out once it passes that 160 degree mark while dark meat needs to reach a temperature of at least 165 degrees.