Millefeuille (Vanilla Custard Slice)
Why this recipe works
- Crisp and creamy contrast: Flat-baked puff pastry gives the slice a delicate crunch, while the thick vanilla custard provides a smooth, rich centre.
- Classic pastry method: Baking the pastry between trays keeps the layers even and neat, making the finished millefeuille easier to stack and slice.
- Components can be prepared ahead: The pastry and custard can be made in advance and kept separate, then assembled closer to serving for the best texture.
Get the most out of this recipe
Timing notes
- Cool the pastry fully: Assemble only once the pastry is completely cool; warm pastry will soften the custard and lose its crispness quickly.
- Chill the custard until firm: The custard should be cold and thick enough to spread without running, which helps the layers stay defined.
- Best served soon after assembly: Millefeuille is at its crispest within a few hours of layering, before the pastry begins to absorb moisture from the custard.
Texture tips
- Bake until deeply golden: Pale pastry will taste underbaked and soften faster; a deep golden colour gives better flavour and a cleaner bite.
- Strain the custard: Passing the custard through a sieve-strainer removes any small lumps and gives the filling a polished, silky finish.
- Keep components separate if storing: For the best texture, store the baked pastry and chilled custard separately, then assemble close to serving.
Common mistakes
- Not thickening the custard enough: The custard needs to bubble and become very thick before chilling; if it is too loose, the layers will slide when cut.
- Boiling the milk aggressively: Heat the milk until steaming rather than boiling hard, then whisk it gradually into the yolks to keep the custard smooth.
- Cutting immediately after assembly: A short chill helps the custard firm up around the pastry, making the slices neater and less likely to collapse.
Ingredient notes
- Choose all-butter puff pastry: All-butter pastry gives a cleaner flavour and more delicate flake, which suits the simple vanilla custard filling.
- Use whole milk for the custard: Whole milk gives the filling enough body and richness without making it heavy.
- Vanilla can be adjusted: Vanilla bean paste can replace extract if you want a more pronounced vanilla flavour and visible seeds.
Equipment you'll need
Ingredients
Pastry layers
Vanilla custard filling
To finish
Instructions
- Heat the oven to 200°C (390°F). Line two baking trays with parchment paper.
- Roll the puff pastry on a lightly floured surface to about 3 mm thick, then cut into 3 equal rectangles. Prick all over with a fork, set on the trays, and cover with another sheet of parchment paper; sit a second tray on top to keep the pastry flat.
- Bake for 20 minutes, then remove the top tray and parchment. Continue baking for 8 to 12 minutes until deeply golden and crisp, rotating the trays halfway if needed.
- Cool the pastry layers completely on the trays. If any pieces have puffed unevenly, gently press them flat while still warm, taking care not to crack them.
- Meanwhile, make the custard: warm the whole milk in a saucepan over medium heat until steaming but not boiling. In a bowl, whisk the egg yolks, caster sugar and cornflour until smooth and pale.
- Pour the hot milk onto the yolk mixture in a steady stream, whisking constantly. Return everything to the saucepan and cook over medium heat, whisking, until very thick and bubbling, about 2 to 4 minutes.
- Take off the heat and whisk in the unsalted butter and vanilla extract until glossy. Pass the custard through a sieve-strainer into a bowl, then cover the surface directly and chill until cold and firm.
- To assemble, place one pastry rectangle on a board and spread over half the chilled custard in an even layer. Top with a second pastry rectangle, spread with the remaining custard, then finish with the final pastry layer.
- Chill the assembled millefeuille for 15 minutes to help it slice cleanly. Dust generously with icing sugar, then cut with a sharp serrated knife using gentle sawing motions.
Recipe notes
Tips
- For the neatest layers, let the pastry cool fully before assembling and chill the custard until it holds its shape when spread.
- When slicing, use a long serrated knife and minimal pressure so the pastry does not shatter.
- Food safety: if serving to pregnant people, young children, older adults, or anyone immunocompromised, use pasteurised egg yolk.
Substitutions
- Replace Vanilla extract with vanilla bean paste for a more intense vanilla flavour.
- Replace Caster sugar with granulated sugar, whisking a little longer so it dissolves well into the egg yolks.
Storage
- Refrigerate up to 2 days
- Store assembled millefeuille in the fridge in a covered container; the pastry will soften over time. For best texture, keep the baked pastry layers and custard separate, then assemble within a few hours of serving.
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Recipe overview
- Servings: 4 servings
- Yield: millefeuille slices
- Total time: 1h 45min (45min active)
- Difficulty: Medium
- Cuisine: French
-
Allergens:
Eggs Gluten Milk Wheat
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