Ingredients:
For the Pastry:
3 sheets puff pastry, chilled (homemade or store-bought)
For the Custard Filling:
4 cups whole milk
1 cup granulated sugar
4 large egg yolks
1/2 cup cornstarch
2 tsp vanilla extract (or a scraped vanilla bean)
1/2 cup unsalted butter
For the Diplomat Cream:
1 cup heavy whipping cream, whipped to stiff peaks
Instructions:
Bake the Pastry:
Preheat oven to 400°F (200°C).
Prick the puff pastry sheets with a fork (docking).
Bake between two parchment sheets with a baking tray on top to prevent over-rising, until deeply golden.
Make the Custard:
Whisk milk, sugar, egg yolks, and cornstarch over medium heat until thickened.
Stir in butter and vanilla. Cover with plastic wrap touching the surface and chill completely.
Lighten the Cream:
Whip heavy cream to stiff peaks.
Fold whipped cream gently into the chilled custard until smooth.
Assemble:
Trim pastry edges for uniformity.
Place first pastry layer on a serving plate.
Spread a generous amount of cream evenly.
Repeat with remaining layers.
Finish:
Crush trimmed pastry edges into fine crumbs.
Sprinkle crumbs evenly over the top and sides of the cake.
How to Make:
Use an offset spatula to level cream between layers for professional-looking results.
Let the assembled cake rest in the refrigerator 6–8 hours for the pastry to soften slightly and slice cleanly.
Variations:
Chocolate Napoleon: Add 1/4 cup cocoa powder to custard and drizzle chocolate ganache on top.
Berry Napoleon: Layer fresh raspberries or sliced strawberries between pastry and cream.
Caramel Layer: Drizzle salted caramel sauce between layers for extra indulgence.
Nutty Topping: Mix toasted crushed hazelnuts or almonds with pastry crumbs for added crunch.






