Place puff pastry on a lightly floured surface and roll out into a rectangle (about 8×16).
Preheat oven to 360°
With a sharp knife, cut into 6 to 8 equal squares.
Cut brie into 6 to 8 equal wedges.
Lay 1 wedge of the cheese diagonally in the center of each pastry square. Press down to flatten.
Top cheese with a portion of raspberries.
With a pastry brush, brush egg onto the outer edge of the dough.
Fold the dough in half and press to seal.
Place the pastries on a lightly greased baking sheet and bake until golden brown and risen – 12 to 15 minutes.