How do you think the printed cookies showed by image ? They are printed cookies , printed by food printer using edible ink on the white surface of these cookies.
For food printer, we have A1, A2 , A3+ size, which is with 1 or 2 print heads for different printing speed and printing size, it is ink-jet for printing directly.
Edible ink color, it is colored C (cyan). M (Magenta). Y (yellow). K ( black). LC (light cyan). LM ( light magenta). Printed cookies are edible.