think a DA Vinci mini 3D Printer may be a good choice. also i work for essay grading online and there i edited one paper on 3d food printing and in that paper there were two artccles you may find interesting:
1-http://www.cnn.com/2014/11/06/tech/innovation/foodini-machine-print-food/
2-https://www.digitaltrends.com/cool-tech/3d-food-printers-how-they-could-change-what-you-eat/
best