In a large bowl, sift together 2 cups flour, baking powder, salt and sugar; mix well. Cut in butter with a fork until crumbs form. In a separate bowl, whisk together buttermilk and egg; add to flour mixture. Mix just to incorporate without overworking the dough. In another bowl, toss berries in remaining flour; gently fold berries into batter. Drop large tablespoons of batter onto ungreased baking sheets. Bake at 400 degrees for 15 to 20 minutes, until golden. Cool scones on a wire rack. Prepare Orange Glaze: In a double boiler, combine butter, sugar and enough juice for desired consistency. Cook and stir until thickened; remove from heat. Beat until smooth and slightly cooled Drizzle or brush Orange Glaze over scones. Let stand until glaze becomes hazy and hardened. Makes 1/2 to one dozen scones.