Prepare the Puff Pastry:

1. Preheat the oven:
   • Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
2. Roll out the pastry:
   • Roll out one puff pastry sheet on a floured surface to form a 10–12-inch (25–30 cm) circle. Use a round plate or bowl as a guide to cut a neat circle. Repeat with the second sheet.

Assemble the Star:

3. Layer with Nutella:
   • Place one circle of puff pastry on the prepared baking sheet. Spread Nutella evenly across the surface, leaving a 1-inch (2.5 cm) border around the edges.
4. Add the second layer:
   • Place the second puff pastry circle on top, aligning the edges. Gently press the edges to seal.

Shape the Star:

5. Mark the center:
   • Place a small glass or bowl (about 2 inches/5 cm in diameter) in the center of the circle. Do not press too hard.
6. Cut the star rays:
   • Using a sharp knife, cut the pastry into 16 equal strips from the edge of the glass to the outer edge of the circle.
7. Twist the strips:
   • Take two adjacent strips and twist them away from each other two to three times. Pinch the ends together to form a point. Repeat with the remaining strips to create a star shape.

Bake the Wreath:

8. Brush with egg wash:
   • Beat the egg in a small bowl and lightly brush it over the entire pastry for a golden finish.
9. Bake:
   • Bake for 20–25 minutes, or until the pastry is puffed and golden brown.
10. Cool and decorate:
    • Let the star cool slightly. Dust with powdered sugar, if desired, before serving.