A rönttönen () is a traditional sweet Finnish delicacy from the region of Kainuu.
A small (about the size of the palm of a hand) open faced pie consisting of a crust made of barley or rye dough, filled with a sweetened mashed potato and berry (most often lingonberry) filling.'Rönttönen sai EU:n nimisuojan'(In Finnish) Helsingin Sanomat, 4.Nov.2008
Typically, it is served as an accompaniment to a coffee.
The Kainuun rönttönen has a protected geographical indication under the EU law.Kainuun rönttönen Profile European Commission
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