Thaw the puff pastry according to the package directions. Preheat the oven to 400 degrees and cover a baking sheet with parchment paper. Unfold both sheets of pastry and divide each into thirds by ...

The directions on a box of puff pastry simply say to bake the pastry sheets. If you do so, the pastry will puff up (puff pastry, remember?), and your Napoleon will be quite unwieldly and difficult to ...