These interlocking circles are both a mathematical composition and a traditional Celtic motif. It can also be found as a basis of mandalas.
We have successfully printed this design in meringue, royal icing and chocolate.
To find recipes and slicing parameters:
https://www.lapatisserienumerique.com/en/cakewalk-3d-en/recipes/

To buy the extruder to install on your 3D printer:
https://www.kickstarter.com/projects/digitalpatisserie/cakewalk-3d-a-handy-food-extruder-for-your-own-3d-printer