1Preheat oven to 355°F. Lay the puff pastry sheets on a baking tray lined with parchment paper and cut in half down the middle. Prick them gently with a fork to avoid puffing too much.
2Cover with another piece of parchment paper and place another baking tray or oven-safe pan on top to weigh it down.
3Bake for about 20-25 minutes, or until golden and crispy. Let cool.
4Break or cut one of the baked sheets into small pieces for the topping and set aside.
5Whip the cream, milk, vanilla pudding powder, and sugar until firm peaks form.
6Place one full sheet of the baked puff pastry on a serving tray, spread some of the cream mixture evenly on top, and top with another full sheet of puff pastry.
7Repeat until you have 3 layers of puff pastry and cream as the last layer.
8Take your crumbled puff pastry pieces and cover the entire napoleon on all sides.
9Sprinkle generously with powdered sugar and chill for at least 3 hours before serving.
10Serve with sliced strawberries in sugar on top as garnish.