I didn’t know this was a thing until someone asked me to make them. To me, they’re a lot like those Royal Danish butter cookies you might get as a gift in one of those blue tins. I tried looking into if there is a difference between Norwegian and Danish butter cookies, but couldn’t find anything. I have a sneaking suspicious they’re the exact same thing, but don’t tell the Norwegians or Danes this as they’ll likely get offended by the notion. 😉