The Hirshon Finnish Blueberry Pie – Mustikkapiirakka

Name: The Hirshon Finnish Blueberry Pie – Mustikkapiirakka
Cuisine: European
Ingredients: 12 T. unsalted European-style cultured butter, softened; ½ cup regular sugar + 2 T. light brown sugar; 1 large organic egg; 1 ½ cup flour (7 oz. weighed); 1 tsp. Aluminum-free baking powder; ***; 1 ½ cup fresh blueberries or use frozen wild blueberries (strongly preferred!); ¾ cup Crème fraîche; ¼ cup Viili (Finnish stretchy yogurt) – if unavailable, use plain full-day Greek yogurt or full-fat sour cream (Daisy brand strongly preferred); 1 large egg; 4 T. Light brown sugar; 1 tsp. vanilla extract; An optional dusting of fresh cardamom if you’re so inclined – I am!