- Why is the custard runny?
- You didn't cook it long enough with the cornstarch, or didn't chill it fully. Cornstarch needs to boil to activate its thickening power.
- How do I cut it without squashing the cream?
- It helps to pre-cut the top pastry layer into squares before assembling.
Vanilla Custard Slice (Napoleon)
The 'Krémes' is the king of pastry shops, but making it at home is a true triumph. It's all about contrast: crisp, thousand-layer pastry meets trembling, cool vanilla custard. This version uses store-bought puff pastry to save hours of folding, without sacrificing the experience.
Ingredients
1
lb (2 sheets)
Puff Pastry (thawed)
4
large
Egg Yolks
3/4
cup
Granulated Sugar
1
bean
Vanilla Bean (or 2 tsp paste)
2
cups
Whole Milk
1/3
cup
Cornstarch
3/4
cup
Heavy Cream (cold)
2
tbsp
Powdered Sugar
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Equipment Needed
- Baking sheet
- Whisk
- Saucepan
- Serrated knife
Allergen Information
Wheat
Milk
Egg
Instructions
1
✓
Roll out puff pastry and cut into two equal sheets. Prick all over with a fork. Bake at 400°F (200°C) until golden brown (approx. 15 mins).
Tip: Pricking (docking) allows steam to escape so the pastry rises evenly rather than puffing into a balloon.
2
✓
Scrape vanilla seeds into the milk and heat just to a boil.
Tip: Heating infuses the milk with vanilla flavor.
3
✓
Whisk egg yolks with sugar and cornstarch until pale. Slowly pour in hot milk while whisking constantly (tempering).
Tip: Pouring slowly prevents the eggs from scrambling.
4
✓
Pour back into the pot and cook over medium heat, stirring constantly, until thick. Cool completely.
Tip: Once it bubbles, cook for 1 more minute to cook out the starchy taste.
5
✓
Whip the cold heavy cream to stiff peaks and gently fold into the cooled custard.
Tip: This step lightens the heavy custard.
6
✓
Spread custard over one pastry sheet. Cut the second sheet into squares, then place them on top. Chill for 2-3 hours.
Tip: Pre-cutting the top prevents the filling from squishing out when serving.
Recipe FAQ
Ingredients
- 1 lb (2 sheets) Puff Pastry (thawed)
- 4 large Egg Yolks
- 3/4 cup Granulated Sugar
- 1 bean Vanilla Bean (or 2 tsp paste)
- 2 cups Whole Milk
- 1/3 cup Cornstarch
- 3/4 cup Heavy Cream (cold)
- 2 tbsp Powdered Sugar