Second “surprising Finnish confectionary” is Vihreät Kuulat Jaffa Cakes. I ran vihreät kuulat through a translation tool and apparently it means “green balls”, which doesn’t tell me much.
Knowing it was neither lime nor apple (which were also available in the supermarket I visited) I had to try them, but I couldn’t place the flavour. They were tasty, though. We finished eating them before I looked it up.
Turns out it’s pear flavour, which apparently I have a blind spot for (back in 2013 at an “eat mystery food in the dark” restaurant I failed to identify that I was eating poached pears for dessert).
Now I need to be on the lookout for actual green balls.