Preheat your oven to 400°F (200°C). Line a small baking sheet with parchment paper.
Lay out the puff pastry on a lightly floured surface. Place the Brie in the center. Drizzle with honey or maple syrup and sprinkle chopped nuts over the top.
Fold the puff pastry over the cheese, sealing the edges. Flip seam-side down onto the prepared baking sheet.
Brush the top with beaten egg. Optionally, decorate with small pastry cut-outs.
Bake for 25 minutes until golden brown. Let rest for 10 minutes before serving.