Yes, you can cook two small turkeys or two turkey breasts at the same time if your oven is large enough for heat to circulate between the pieces of meat for the bag(s) to expand without touching the oven racks or walls. You can use one turkey size oven bag or two large size oven bags. Cook for 15 minutes longer than the cooking time of the largest piece of meat. Then, check both pieces of meat for doneness with a meat thermometer.