The problem with using 3D printers as food printers is that the preparation time and cleanup time make the labor-saving of having a machine to do it become a bad investment. Much easier, generally, to simply make the food oneself.
However, for this particular aspect, it might be reasonable to look into having a robot in the kitchen.
What are you talking about...a robot in the kitchen? I AM the robot in the kitchen! I just need to have my circuits readjusted...replaced...overhauled...
I hereby request to join ‘Face in the kitchen. Might as well make myself useful around here since my monumental fail with the juvenile plesiosaurs.