tl;dr:
Download snowflakes.scad if have both OpenSCAD and MCAD dev.
Download monoflakes.scad if have OpenSCAD only.

=== commence rambles ===

Thoughts:

1) existing cookie cutters are inefficient, how many times do I really want to reroll dough scraps
2) hey hexagons tile on the plane
3) I should start holiday baking

So here's a thing with fiddlable numbers to generate whatever wonky snowflakes, within a hexagonal cookie cutter template.

Absolutely no guarantee is made of sensible cutters coming from this, but it should provide amusement I suppose.

Would recommend printing it design side up, with supports, so the design doesn't imprint support structure removal scar patterns on your cookies although to be honest I suspect it won't matter much either way.

Needs MCAD dev.