These are two cookie cutters based on the aperiodic monotile ("one stone") shapes discovered by David Smith as described here:
https://www.nytimes.com/2023/03/28/science/mathematics-tiling-einstein.html
Flip some of your cookies for the full tesselation.
Thanks to Manfred Pietsch for sharing the article!
Update: I've added the “Hat in Turtles” and “Turtle in Hats” supertiles described here:
https://cs.uwaterloo.ca/~csk/spectre
The author marked this model as their own original creation.