Stage 1 - 20 min.
The day before, or several hours before, make crème pâtissière
Roll out puff pastry as thinly as possible. Then put on a baking sheet
in the fridge for about one hour, so that if it needs to shrink, it happens in the fridge instead of the oven.
It is very difficult to make a regular rectangle (see photo) but don't worry about that.
Preheat oven to 410°F (210°C).
Stage 2 - 30 min.
Put a sheet of cooking parchment onto pastry and place a cooling rack on top. We do that to stop puff pastry swelling too much during cooking, essential for millefeuilles.
Put in the oven for about 30 minutes, but remove paper and rack after 20 minutes to allow pastry to brown.
Stage 3 - 15 min.
When pastry is cooked, remove from the oven, allow to cool a little and put on a rack to finish cooling.
Stage 4 - 5 min.
With a bread knife or steak knife, trim the edges of puff pastry to get a regular rectangle (you can use a ruler to help with this).
Stage 5 - 3 min.
Cut the rectangle into three. (use the first piece as a template to cut the others to the same size)
Look at the three parts to determinate the best looking, that means flat, regular and brown. This will be the top of your millefeuille.
Stage 6 - 1 min.
Make 150 g Chantilly cream
and fold it gently into crème pâtissière, with a maryse
by turning with the bowl tipped at an angle.
You will get a delicious vanilla cream, light and perfumed.
Stage 8 - 3 min.
On the serving plate (quite impossible to move a millefeuille when finished without catastrophe), put the least pretty piece of pastry.
Stage 9 - 5 min.
With a forcing bag
full of cream, pipe small balls or rosettes of cream...
... over the whole surface.
Stage 11 - 2 min.
Then gently add the second piece of puff pastry.
Stage 12 - 5 min.
Cover with more piped balls of cream.
Stage 13 - 10 min.
Mix 1 tablespoon water with 4 tablespoons icing sugar to make a glacé icing, and spread over top of last (and best) piece of puff pastry.
You can also add trails of melted chocolate, but it's not easy to do well.
If you want to be sure of quick success, just sprinkle
top with icing sugar.
Stage 14 - 3 min.
And finally, place the last puff pastry piece on top.
Your millefeuille is ready to serve.