a method for freezing a food product in a cryogenic freezer includes sensing at least one physical characteristic of the food product in real time , providing a cryogenic substance to the food product for heat transfer at said food product , automatically self - adjusting the heat transfer at the food product responsive to the sensing the at least one physical characteristic , and continuously self - adjusting the heat transfer for bringing the food product to a select temperature . a related freezer apparatus is also provided .