Vanilla Custard Slice (Napoleon Slice)

Introduction

Light, creamy, and irresistibly smooth, the Vanilla Custard Slice—also known as the Napoleon Slice—is a classic dessert loved across generations. With its delicate layers of flaky pastry, velvety vanilla custard, and a dusting of powdered sugar on top, this dessert is as elegant as it is comforting. Shared by deesviral, this recipe transforms simple ingredients into a bakery-style masterpiece right from your own kitchen. It’s perfect for holidays, family gatherings, or anytime you want to indulge in a timeless sweet treat.

Ingredients

For the pastry base and top
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. Prepare the pastry
   Preheat oven to 400°F (200°C). Place puff pastry sheets on baking trays lined with parchment paper. Prick with a fork to prevent puffing too much and bake for 12–15 minutes, until golden. Cool completely.

2. Make the custard
   In a saucepan, heat the milk until just simmering. In a separate bowl, whisk egg yolks, sugar, and cornstarch until smooth. Slowly pour 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 extract. Cover with plastic wrap touching the surface and let cool.

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3. Fold in whipped cream
   Once the custard has cooled, gently fold in the whipped cream to create a light, fluffy filling.

4. Assemble the slice
   Place one sheet of baked puff pastry at the bottom of a square or rectangular baking pan. Spread the custard filling evenly on top. Place the second sheet of pastry over the custard, pressing gently. Refrigerate for at least 4–6 hours, or overnight for best results.

5. Finish and serve
   Dust generously with powdered sugar before slicing into squares or rectangles. Serve chilled.

Storage Tips

Keep the custard slice refrigerated, covered, for up to 3 days. It’s best enjoyed within the first two days for maximum freshness. Freezing is not recommended, as the custard may lose its creamy texture once thawed.

Why This Recipe Works

The flaky puff pastry provides a crisp contrast to the rich, creamy custard filling. Folding whipped cream into the custard creates a lighter texture, making every bite smooth and airy. The simplicity of powdered sugar on top keeps the dessert classic while highlighting the custard’s natural vanilla flavor.

Closing

The Vanilla Custard Slice is the ultimate blend of elegance and comfort, offering a dessert that feels both nostalgic and luxurious. Easy to prepare yet impressive to serve, it’s guaranteed to leave everyone at the table asking for seconds. Try this recipe at home and explore more delicious creations from deesviral to sweeten your everyday moments.