Ingredients for - Napoleon Cake
How to cook deliciously - Napoleon Cake
1. Stage
In a large heatproof bowl, whisk egg yolks, cornstarch, salt, and 1/2 cup (99 g.) granulated sugar.
2. Stage
In a medium pot over medium heat, heat milk and remaining 1/2 cup (98 g.) granulated sugar, stirring, until sugar is dissolved and milk is steaming. Whisking constantly, pour half of hot sugar milk into egg mixture. Pour milk-egg mixture into pot and cook over medium heat, stirring constantly, until pastry cream boils and thickens to a pudding-like consistency, 1 to 2 minutes. Cook, stirring, 1 minute more, then remove from heat. Stir in butter and vanilla.
3. Stage
Pour hot pastry cream onto a rimmed baking sheet and cover with plastic wrap, pressing directly onto pastry cream. Refrigerate until cold.
4. Stage
In a large bowl, whisk heavy cream until stiff peaks form. Transfer cold pastry cream to another large bowl and stir until smooth. Stir one-quarter of whipped cream into pastry cream until combined. Using a rubber spatula, carefully fold in remaining whipped cream. Refrigerate pastry cream filling until ready to assemble.
5. Stage
Make Ahead: Pastry cream (without whipped cream folded in) can be made 3 days ahead. Keep chilled.
6. Stage
Preheat oven to 400° and line a rimmed baking sheet with parchment paper. Remove 1 sheet of puff pastry from refrigerator. On a lightly floured surface, roll out to a 13"-by-13" square. Cut square into 2 rectangles, transfer to prepared baking sheet, and prick all over with a fork.
7. Stage
Bake, rotating sheet and flipping pastry halfway through, until deeply browned and crisp, 12 to 15 minutes. Transfer to a wire rack and let cool completely.
8. Stage
Repeat with remaining 3 sheets of puff pastry for a total of 8 pastry rectangles.
9. Stage
Stack 7 puff pastry rectangles on top of one another; set remaining 1 rectangle aside. Using a serrated knife, trim edges so rectangles are a uniform shape; reserve crumbs.
10. Stage
Arrange 1 puff pastry rectangle on a platter. Spread 1 cup pastry cream filling over puff pastry rectangle; top with a second rectangle and spread with 1 cup filling. Repeat layering with 5 remaining rectangles and 5 cups filling. Cover sides of cake with remaining filling.
11. Stage
Loosely cover with plastic wrap and refrigerate cake at least 4 hours or, preferably, up to overnight.
12. Stage
Before serving, crush reserved puff pastry rectangle to fine crumbs, add to reserved crumbs, then press into sides and top of cake. Top with berries.