How to Make Viking Funerary Flatbread
atlasobscura.com
atlasobscura.com
The Wikipedia article even has in illustration of this storage method: https://en.wikipedia.org/wiki/Crispbread#Origins
Trader Joe's carries Norwegian dried flat bread of some sort, but it's different. More seeds and way more dense.
However, you absolutely cannot get good rye bread anywhere in the western US. I've never spent time on East coast, maybe one of the immigrant-heavy areas might have it. Whatever is labeled as rye bread here (Jewish rye, Russian rye, ...) is different from the rye bread in the Nordics.
Of course, it wouldn't be a viking bread without blood
This will be handy the next time I want to make pancakes, but I'm out of buttermilk.
We eat them weekly with dung smoked lamb and plenty of butter.