Prepare the almond cream:
In a saucepan, heat the milk with the split vanilla pod until fragrant. Remove the pod once the aroma is released.
In a mixing bowl, combine the sugar and cornstarch, then add 2 eggs and whisk well.
Gradually add the hot milk to the egg mixture, stirring constantly.
Return the mixture to the heat and cook until it thickens, then stir in the softened butter and grated almonds. Optional: add bitter almond essence if desired.
Assemble the cake:
Preheat your oven to 180°C (350°F).
Roll out one puff pastry sheet onto a parchment-lined baking tray.
Spread the almond cream filling in the center, leaving about 2 cm around the edges.
Place the second puff pastry sheet on top and seal the edges by pressing down firmly. Create a decorative pattern on top with a knife.
Bake the cake:
Beat the remaining 2 eggs and brush over the top pastry for a beautiful golden finish.
Refrigerate for 15 minutes before baking to help it puff up nicely.
Bake in the preheated oven for 30-35 minutes until golden and crispy.
Serve and savor:
Allow to cool slightly, then slice and serve with a warm coffee or a scoop of vanilla ice cream. Enjoy every royal bite!