Prepare the Puff Pastry:

1. Preheat the Oven: Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
2. Roll Out the Puff Pastry: Lay the two sheets of puff pastry on a clean surface. If the pastry is too thick, gently roll it out with a rolling pin until it’s about 1/8-inch thick.
3. Trim the Edges: Using a sharp knife, trim both sheets of puff pastry into a large triangle shape. You can simply cut the pastry into the shape of a Christmas tree, making sure the top point is sharp and the bottom is wide.

Add the Nutella Filling:

4. Spread the Nutella: Spread a generous layer of Nutella on one of the puff pastry triangles, leaving about ½ inch from the edges. Make sure it’s spread evenly.
5. Layer the Pastry: Place the second puff pastry triangle on top of the Nutella-covered pastry, aligning the edges. Gently press down to seal the two layers together.

Cut and Shape the Tree:

6. Make the Tree Shape: Using a sharp knife, make cuts along both sides of the triangle to form a tree shape. Be sure to leave a little room at the top for the tree’s point and some space at the bottom for the trunk.
7. Cut the Branches: Starting from the center of the tree, cut diagonal lines outward to create “branches.” Be sure to leave the center intact.

Create the Pull-Apart Design:

8. Twist the Branches: Carefully twist each “branch” of the tree in opposite directions to create the pull-apart effect.
9. Brush with Egg Wash: Beat the egg and brush it over the surface of the pastry to give it a golden finish as it bakes.

Bake and Finish:

10. Bake the Tree: Place the prepared pastry on the baking sheet and bake in the preheated oven for about 15 minutes, or until the pastry is golden brown and puffed.
11. Dust with Powdered Sugar: Once the tree has cooled slightly, dust it with powdered sugar to give it a festive snowy look. You can also add chopped hazelnuts or sprinkles for an extra touch of holiday cheer.