Place one sheet of puff pastry on a flat surface. Generously spread Nutella over the entire sheet. Once evenly coated, place the second sheet of puff pastry on top.

Using a knife or pizza cutter, cut out a Christmas tree shape. It's as simple as cutting a large triangle for the tree and a small rectangle for the trunk. If you have Christmas-themed cookie cutters, use the leftover pastry from the edges to create fun shapes for decorating your tree later!

To make the tree branches, cut horizontal strips on the sides of the triangle, leaving the center intact. Then twist each strip gently to form the "branches" of your tree.

Remember the shapes you made with the leftover pastry? Now’s the time to use them! Arrange these festive cutouts as decorations on your tree.

Beat the egg and brush it evenly over the entire pastry tree, including the branches and decorations. Preheat your oven to 392°F (200°C), and bake the tree for about 20-30 minutes, or until golden and crispy. Keep an eye on it, as baking time can vary depending on your oven.