Finnish Blueberry Pie (Mustikkapiirakka) This is an authentic Finnish Recipe. Although it&#x27;s called berry pie, it&#x27;s actually more like cake. Mustikkapiirakka has a batter base, not a pastry crust &amp; It&#x27;s very delicious! Not to sweet, but has a fresh clean taste. This dessert is typically served as an afternoon treat, along with a scoop of ice cream, and a good strong cup of coffee. YUM!.