Most of the time, turkey burgers have much less fat than a traditional beef burger. To keep turkey burgers from getting dry, add moist ingredients such as finely chopped onion, and ingredients that add in some additional fat, such as mayo. It's also important not to overcook the turkey burgers. Remove them from the heat once they reach an internal temperature of 165 degrees F. Resting for 5 minutes after cooking will also help the burgers stay nice and juicy!