Robots are already being used to flip burgers, serve coffee, cook eggs, and complete orders at restaurants. The Robofusion Ice Cream Kiosk is a robotic system that makes ice cream for customers while lowering costs in the process. It can make 45 treats per hour. It has an easy to operate interface.
You are going to need 24 square feet of space for this machine. These kiosks accept credit cards and cash. You can find out more about them here.