Vanilla Custard Slice (Napoleon Slice)

Introduction

Light, creamy, and irresistibly smooth, the Vanilla Custard Slice—also known as the Napoleon Slice—is a timeless dessert adored across generations. With its layers of crisp, flaky pastry, luscious vanilla custard, and a delicate dusting of powdered sugar, it’s as elegant as it is comforting. Shared by deesviral, this recipe turns simple ingredients into a bakery-style treat you can proudly make at home. Perfect for holidays, special gatherings, or whenever you crave a classic sweet indulgence.

Ingredients

For the pastry

• 2 sheets puff pastry, thawed

• Powdered sugar, for dusting

For the custard filling

• 4 cups (1 liter) whole milk

• 1 cup (200 g) granulated sugar

• 6 large egg yolks

• 1/2 cup (70 g) cornstarch

• 1/2 cup (115 g) unsalted butter, cubed

• 2 tsp pure vanilla extract

• 1 cup (240 ml) heavy cream, whipped to soft peaks

Instructions

1. Bake the pastry

Preheat oven to 400°F (200°C). Place puff pastry sheets on parchment-lined trays. Prick with a fork to prevent excessive puffing and bake for 12–15 minutes, until golden and crisp. Let cool completely.

2. Make the custard

In a saucepan, gently heat the milk until just simmering. Meanwhile, whisk egg yolks, sugar, and cornstarch in a bowl until smooth. Gradually pour the hot milk into the egg mixture while whisking constantly. Return mixture to the saucepan and cook over medium heat, whisking, until thickened. Remove from heat and stir in butter and vanilla. Cover with plastic wrap pressed against the surface and let cool.

3. Lighten the filling

Once cooled, gently fold the whipped cream into the custard for a light, silky texture.

4. Assemble the slice

Place one baked puff pastry sheet at the bottom of a square or rectangular dish. Spread the custard filling evenly over it. Top with the second pastry sheet, pressing lightly to set. Refrigerate for at least 4–6 hours, or overnight for clean, neat slices.

5. Finish and serve

Before serving, dust generously with powdered sugar. Cut into squares or rectangles with a sharp knife and serve chilled.

Storage Tips

Refrigerate, covered, for up to 3 days. Best enjoyed within the first two days for peak freshness. Freezing is not recommended, as the custard may lose its creamy consistency after thawing.

Why This Recipe Works

The crisp puff pastry contrasts beautifully with the creamy custard filling, while folding in whipped cream gives the custard a light and airy texture. A simple dusting of powdered sugar keeps the dessert classic, allowing the vanilla flavor to shine.

Closing

The Vanilla Custard Slice is the perfect harmony of sophistication and comfort—easy to prepare yet impressive to serve. Each bite is a balance of flaky pastry and creamy custard that melts in your mouth. Try it at home and explore more delightful creations from deesviral to make everyday moments a little sweeter.