Set your oven to around 350°F (175°C) if you're following a standard recipe, though some recipes might suggest a slightly higher temperature like 400°F (200°C).

If using frozen puff pastry, ensure it's thawed according to package instructions. It should be cold but pliable.

Roll out the puff pastry on a lightly floured surface if it isn't already in a sheet form. Aim for a rectangle shape for easier rolling. If the pastry comes pre-rolled, simply ensure it's even.

Spread a generous but even layer of Nutella over the entire surface of one sheet of puff pastry, leaving a small border along one of the longer edges for sealing later. If Nutella is too firm to spread easily, you can warm it slightly in the microwave.

Starting from the opposite end of where you left the border, gently but firmly roll the pastry into a log. Press the border down to seal it.

Using a sharp knife or a pizza cutter, slice the log into even pieces, about 1 to 1.5 inches thick.

Place the rolls on a baking sheet lined with parchment paper, spacing them apart to allow for expansion.

For a golden finish, beat an egg with a little water and brush over the tops of the rolls.

Bake in the preheated oven for about 15-20 minutes or until they are golden brown and the puff pastry has puffed up nicely.

Let them cool for a few minutes on the baking sheet before transferring to a wire rack. Optionally, dust with powdered sugar before serving.