[mattsfrey]

It kind of is actually. Nobody escapes the law of universal conservation of energy. Sure some people due to genetics will store more of the energy they consume as fat than others. But if you have an energy deficit the body will consume itself to the tune of that exact deficit, period, end of. It will be a mixture of fat and muscle, but the body does try to maintain muscle to the extent you are utilizing it given there is sufficient protein to maintain it. So lift weights or do resistance training enough to keep the muscle you wish to retain and maintain a good amount of protein intake to support this as well, and the bulk of your body mass consumed will be fat. Other than that it is just maintaining an energy deficit, and the best technique is the one you personally can adhere to consistently.