I don't use a written recipe but I can explain. What I do is, I bake the Pepperidge Farm puff pastry sheets and use those. I defrost one sheet, cut it in 3 equal pieces and roll each of those pieces out to double the size. I bake according to directions on the box. Then once they cool, I cut through each one so I have a total of 6 equal sheets. For the cream, I just whip up some heavy cream and add a little powdered sugar and vanilla as I'm doing it, until it forms soft peaks. Then I add some mascarpone (maybe somewhere between 8 and 16 ounces if I'm not mistaken). If necessary I add some more powdered sugar but I don't make it too sweet. To assemble, lay 2 layers of the halved puff pastry side by side on a large cookie sheet, cut side up. Add some of the mascarpone cream filling. Top each with another layer if halved puff pastry, cut side up. Add more mascarpone cream filling. Top with the final layers of halved puff pastry, cut side down. Mix a little milk and powdered sugar and a small amount of vanilla in a small bowl to make a thick glaze. Very carefully, spread the glaze over the top of the Napoleon. If decorating, do it immediately as the glaze hardens quickly. I sometimes use color sugar as a decoration, and sometimes I melt some chocolate, put it into a ziplock, cut off a small part of the corner and pipe on some stripes. Then I take a toothpick and run it down the opposite way the stripes go, to make the typical design you see at the top of a Napoleon. Tip: for your top layer of pastry, use the one that is the most solid and flat. Puff pastry could be difficult to work with and they have broken on me several times, but I just use those pieces for the bottom and/or middle and no one notices! I make this for my sister's birthday every year. She said it's the only birthday cake she ever wants. Napoleon is her favorite pastry and she says this one is the best.