- Preheat oven to 400°F (200°C).
- Roll out the puff pastry sheet on a parchment-lined baking sheet.
- Prick all over with a fork to prevent puffing.
- Dust with powdered sugar and place another baking sheet on top to keep it flat.
- Bake for 15–18 minutes until golden and crispy.
- Let cool completely, then cut into three equal-sized rectangles.
Step 2: Make the Pastry Cream
- In a saucepan, heat milk until warm but not boiling.
- In a bowl, whisk together egg yolks, sugar, and cornstarch until smooth.
- Slowly pour the warm milk into the egg mixture, whisking constantly.
- Return to heat and cook over medium-low, stirring until thickened.
- Remove from heat, stir in butter and vanilla, and let cool completely.
Step 3: Assemble the Mille-Feuille
- Place one pastry layer on a serving plate and spread half the pastry cream over it.
- Repeat with the second layer and remaining pastry cream.
- Top with the third pastry layer.
Step 4: Add the Glaze (Optional)
- Mix powdered sugar, vanilla, and milk until smooth, then spread over the top layer.
- Drizzle melted chocolate and use a toothpick to create a marble pattern.
Step 5: Chill & Serve
- Refrigerate for at least 2 hours before slicing.
- Serve chilled and enjoy the flaky, creamy perfection!
Serving & Storage Tips
- Best served fresh, but can be refrigerated for up to 2 days.
- Use a sharp serrated knife to slice neatly.
- Store in an airtight container to keep pastry crispy.
Variants & Customizations
- Fruit Napoleon – Add fresh strawberries or raspberries between layers.
- Chocolate Version – Mix melted chocolate into the pastry cream.
- Coffee-Flavored – Add 1 teaspoon instant coffee to the cream.
- Caramel Drizzle – Top with caramel sauce instead of glaze.
FAQ
1. Can I use store-bought custard instead of making pastry cream?
✔️ Yes! But homemade pastry cream is richer and more flavorful.
2. How do I keep the pastry from getting soggy?
✔️ Assemble just before serving or brush pastry layers with melted chocolate to seal them.
3. Can I make this ahead of time?
✔️ Yes! Bake the pastry and prepare the cream ahead, then assemble before serving.
4. What’s the best way to cut Mille-Feuille cleanly?
✔️ Use a sharp serrated knife and gentle sawing motion to prevent squishing the layers.
5. Can I make this gluten-free?
✔️ Yes! Use gluten-free puff pastry and replace cornstarch with arrowroot powder.
Final Thoughts
This Mille-Feuille (Napoleon) is a show-stopping, flaky, creamy, and elegant dessert that’s easier than it looks! Whether you go for classic vanilla, fruit-filled, or chocolate variations, this pastry is a guaranteed crowd-pleaser.