If you’re searching for the undisputed king of all pastries, one that easily outshines any bundt cake with its delicate puff pastry and heavenly light cream, then ordinary sheet cakes simply won’t do. Forget boring desserts—this luxurious French cream slice with crispy layers of puff pastry, rich egg yolk cream lightened with meringue and rum, a generous layer of real whipped cream, and a dusting of powdered sugar is the absolute pinnacle, guaranteed to disappear from your table in no time.
The secret to success lies in baking the thin pastry sheets quickly at high heat, folding stiff meringue into the warm custard, and letting everything chill perfectly.
What you’ll need for a large baking tray:
For the crispy base:
- Puff pastry: 1 package (thawed or chilled)
- Powdered sugar: for dusting the top
For the airy egg yolk cream:
- Whole milk: 1 liter
- Granulated sugar: 200 g
- Vanilla sugar: 2 packets
- Powdered sugar (sifted): 100 g (for the meringue)
- Eggs: 4 (separated yolks and whites)
- Cornstarch pudding powder (or vanilla pudding): 5 packets
- Water: 200 ml (for mixing the pudding)
- Butter: 150 g
- Rum: 50 ml (for perfect aroma and flavor)
For the cream layer:
- Heavy cream (min. 33%): 1 liter (or the equivalent amount of instant whipped cream powder)
Step-by-step preparation guide:
1. Baking the crispy pastry sheets: Divide the puff pastry package into two halves. Roll each half into a thin sheet the size of your baking tray. Prick the sheet all over with a fork (this prevents the pastry from puffing up into uneven bubbles during baking) and bake in a hot oven at 220 °C for about 8 minutes until golden. Let the baked sheets cool completely.
2. Preparing stiff meringue: In a clean bowl, beat the egg whites until very stiff peaks form. Once the meringue holds its shape, gently fold in the sifted powdered sugar with a spatula so the meringue becomes glossy and stable.
3. Cooking the egg yolk cream with rum: In a saucepan, bring the milk to a boil with the granulated and vanilla sugar. In 200 ml of cold water, thoroughly mix the pudding powder and egg yolks. Pour this mixture into the boiling milk and whisk constantly to cook a thick custard. While still warm (but not boiling), beat in the butter. Finally, gently fold in the prepared sweet meringue and 50 ml of fragrant rum with a wooden spoon.
4. Assembling the cream slice: Spread the still warm custard cream over the first baked pastry sheet placed on the tray and smooth it out evenly. Chill in the fridge until completely set. Once the custard layer is cold, carefully spread the stiffly whipped cream on top.
5. Final layer and chilling: Carefully place the second baked puff pastry sheet on top (you can pre-cut it into squares to make slicing easier later). Store the entire cream slice in the fridge for at least 6 hours, ideally overnight. Before serving, generously dust the top with powdered sugar.
Practical kitchen tips for the best result:
- Pricking the pastry with a fork: Thoroughly piercing the puff pastry before baking prevents large air bubbles and ensures even layers.
- Folding meringue into warm cream: Mixing the egg white meringue into still-warm custard gives the cream incredible lightness and fluffiness—what everyone loves about this dessert.
- Pre-cutting the top pastry sheet: Lightly scoring the top baked pastry with a knife before slicing the whole dessert will save you a lot of work and keep the cream in place.
