[nikhilpandit]

Not sure if they print the whole thing with colors or if the printed piece is colored later on.

[azdle]

At least in the non-food printers, it's printed in color. They use dyes mixed into the binder and print it out exactly like an inkjet printer does.

[foobarian]

That art looks next to impossible to paint onto the printed piece. Seems plausible that it could be done during printing. Some of these are really beautiful...

[huuu]

Looks like they lay down a thin layer of sugar and bind it with an inkjet head. So they can print layer by layer in full color.