Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.

Unfold puff pastry on a lightly floured surface.

Spread Nutella over one half of the pastry.

Fold the other half over the Nutella and seal the edges.

Cut into 1-inch wide strips.

Twist each strip and place on the baking sheet.

Brush with beaten egg (optional).

Bake for 15-20 minutes, or until golden brown.

Cool slightly and dust with powdered sugar (optional).