A Thousand and One Layers of Indulgence

To make the beurre manié:
Mix the softened butter with the flour and spread it into a 30 × 15 cm rectangle between two sheets of baking paper. Leave to rest in the refrigerator for 2 hours.

To make the détrempe:
Mix the softened butter with the flour. Add the salt, then incorporate the vinegar mixed with water. Mix the dough carefully, without overworking it. Spread out in a 13 × 13 cm square. Shape them into a ball, cover with film and leave to stand in the refrigerator for 2 hours.

To make the pastry:
Place the rectangle of beurre manié in front of you, portrait-style. Place the square of détrempe in the lower half of this rectangle and fold the butter at the top. Then fold over the butter at the bottom and rotate the butter-dough by a quarter turn. Spread out the butter-dough again to a length of approx. 30 × 15 cm on a thoroughly floured worktop. Fold over the top third of the dough and then the bottom third. Rotate again by a quarter turn. Cover with film and set aside at least 1 hour. Do another 2 turns in this way. Leave to rest in the refrigerator for another hour, then finish off with a final turn and store in the refrigerator ideally overnight.

Baking:
Spread out the puff pastry to a thickness of 2 mm. Sprinkle with finely ground roasted hazelnuts. Bake at 210°C for 15 minutes and finish baking at 175°C until golden-brown.

Mix the water and gelatine in a container. Heat two thirds of the whole milk in a saucepan.

Mix the potato starch with the remaining cold milk. Add this to the warm milk and let it thicken, whisking it all the while so it doesn’t stick to the pan.

Then add the rehydrated gelatine. Pour one third of this mixture over the praliné and melted cocoa butter.

Mix vigorously with a whisk so its center looks elastic. Add another third the same way. Then incorporate the final third using the same method.

Add the cold whipping cream, then blend with a hand blender to perfect the emulsion.

Leave to stiffen in the refrigerator, preferably for 12 hours

Bring the milk to the boil then combine it with the rehydrated gelatine.

Pour this onto the GUANAJA 70% chocolate, then emulsify the two.

Store in the refrigerator overnight.