One acquaintance of mine presented 3D-printed stamp for this cookie stamp from Tescoma. See that page for recipes and video on usage.

I don't have it and it's easier to design and print my own, than to go to the store for the Tescoma one.

To make your own stamp insert, just create cylinder of 3 mm height and 45 mm diameter and put your motif on it, extruded by 1.6 mm. Don't forget to mirror it! If you want to plain text one, you can use the OpenSCAD file, just modify the `stamp_text` variable.

Everything is parametric, so if you want to make bigger or smaller cookies, just modify the variables in OpenSCAD file.

The pictures with green horse stamp are of the first version with a bit worse usability.

Everything is held together with friction. You might want to adjust the `stamp_clearance` according to your printer precision. It should be a tight fit, the hole in center is there for pushing it out.

There is additional set of X-mass related stamp inserts from GummiBear.