A simple stamp and/or cookie cutter inspired by a photo of cookies with a similar imprint posted on Reddit by Tall_and_in_pain.
The dimensions are ~75×64 mm.
The sugar cookie recipe is by Preppy Kitchen.
The addition of corn starch seems to be the key. Also don't forget to refrigerate your dough and work in rather small batches.
The author marked this model as their own original creation.