Classic Vanilla Custard Slices Recipe

Vanilla custard slices, also known as “Napoleons” or “Mille-Feuille,” are made of crisp puff pastry filled with thick, creamy vanilla custard and topped with a thin layer of icing. Each bite delivers a balance of textures—crunchy, creamy, and melt-in-your-mouth soft. Though they look fancy, they’re simple to prepare using everyday ingredients, making them perfect for home bakers who want an elegant yet comforting dessert.

Ingredients You’ll Need

For the pastry layers:
2 sheets frozen puff pastry, thawed
1 egg, lightly beaten (for brushing)

For the vanilla custard filling:
2 cups