In a large bowl, combine the flour, sugar, baking powder, and salt. Add the butter and use a pastry cutter or knife to cut the butter into the dry ingredients until butter is roughly the size of small peas (some will be larger, others smaller).

Combine the milk and beaten egg and add to the bowl. Stir until the mixture comes together into a sticky dough. Add the blueberries and brie pieces and fold in gently until incorporated. Pat out dough on a lightly floured surface to about and inch thick. Cut into triangles or rounds.

Place on the prepared sheet pan and brush with a lightly beaten egg and sprinkle with coarse sugar. Bake until golden, about 15-20 minutes. Let cool for a few minutes on the pan and then serve immediately.