I have a new plan for my German plate - Pfeffurnusse biscuits. Looks like they have a similar flavour profile to the suggested Spekulatius, but are a bit thicker and either iced or dusted with icing sugar instead of having a fancy press/roller to make them look pretty.
From what I can tell based on my superficial Google searching Speculaas are Dutch, but there are also versions made in parts of Germany under a slightly different name. Once my textured roller arrives I might try some of those for myself anyway, as I'll be looking for all sorts of rolled biscuit recipies to justify buying it!