Preheat Oven: Begin by preheating your oven to the temperature indicated on the puff pastry package.

Prepare Puff Pastry: Unroll the puff pastry sheet on a clean surface. Brush the melted unsalted butter evenly over the entire surface.

Shape the Pastries: Cut the pastry sheet into strips or squares, depending on your preference.

Baking Setup: Place the cut pieces of puff pastry on a baking sheet lined with parchment paper.

Bake: Transfer the baking sheet to the preheated oven and bake according to the package instructions, or until the pastries are golden brown and crispy.

Cool and Serve: Remove the pastries from the oven and allow them to cool slightly. Serve them warm with Nutella or another sweet spread if desired.