The First Swedish Spettekaka
I first learned of this recipe from Kurtos dot EU, like many other things on this site. The cookbook is named En Nödig och Nyttig Hus-Hålds och Kok-Bok (A Necessary and Useful House- and Cook-book), by Susanna Eger. It was published in 1737 in Stockholm, in typical blackletter Swedish.
The original document is here. And what's that on page 258? Why, a recipe for Spett-Kaka!