@pseudomonas @davidallengreen This is the recipe I started from, but pretty much everything is possible to alter (I never use almonds, for /reasons/), and go heavy on the ginger because I love ginger.
https://coquinaria.nl/en/dutch-speculaas/
Also in some sources you can find versions that go half-and-half or even fully replace the wheat flour with rye flour. IDK if that makes them suitable for gluten-free/wheat allergy people (ask @goatsarah about that I guess)