The embodiments disclose a method including warming food in an integral heat tray insert of a food container, generating heat in the food container using electrical impedance of a plurality of heat dispersing elements, using a control printed circuit board assembly coupled to a power button for activating and controlling electrical components including the plurality of heat dispersing elements, adjusting heat temperatures from the plurality of heat dispersing elements for warming food to a comfortable and safe heat level, using at least one rechargeable battery pack coupled to the control printed circuit board assembly with a power button for activating electrical components including the plurality of heat dispersing elements, and transmitting food status information to a user and receiving user instructions from a user digital device using a food warming system application which includes a timer and variable heat control.