In a large mixing bowl, sift together flour, baking powder, salt and sugar. Knead in butter, using fingertips, until well incorporated and pea-sized lumps form. Sprinkle in ice water, a tablespoon at a time, stirring to combine. When dough starts to come together, divide into two discs and wrap in plastic wrap; chill 30 minutes.
Heat oven to 350 degrees F.
Roll out dough rounds as thin as possible, on a floured surface. Cut out circles using a cookie cutter or glass. Brush with egg wash.
In a medium bowl, stir together blueberries, peaches, bourbon, brown sugar and cinnamon until combined. Place a teaspoon of fruit into the center of pie circles. Fold over to make half moons, crimp edges, and place on a greased baking sheet. Brush pies with egg wash and sprinkle with sugar. Bake 20 minutes or until golden brown. Cool 2 minutes before transferring to wire racks to cool.