Spread chocolate hazelnut spread onto one of the puff pastry sheets. Top with the second puff pastry sheet, sandwiching in the spread.
Cut a rough shape of a pine tree into the dough and cut 2.5 centimeter horizontal lines on either side of the tree, going all the way to the top. Do not cut straight through where the trunk of the tree will be.
Twist each 2.5 centimeter piece and brush the exposed pastry with egg wash.
Bake at 400ºF until golden and pastry has risen, about 20-25 minutes.