- Whisk together the egg yolk, sugar, vanilla sugar and corn starch, then the milk in a saucepan until smooth.
- Bring to a boil over medium heat constantly whisking.
- Take the cream off the heat, add the chocolate and whisk until smooth.
- Transfer to a plastic container, cover with cling film touching the surface, keep in the fridge.
Hazelnut Praliné
- Preheat the oven to 160°C fan.
- Put the hazelnuts on a baking sheet and roast in the oven 10-15 min. To verify whether they are well roasted, cut one open. If the center of the hazelnut is also golden brown, they are ready.
- Remove from the oven and let cool.
- Combine water and sugar in a pot and boil to a caramel.
- Pour onto a baking sheet lined with baking paper, let cool.
- Crack the caramel into smaller pieces and blend together with the hazelnuts to a paste.
Hazelnut Dacquoise
- With the help of an entremet ring (or a plate for example) draw a circle with a diameter of 20cm onto two pieces of parchment paper. Turn the papers upside down.
- Prepare a piping bag with the piping tip.
- Whip up the egg whites to a stiff peak, gradually adding the sugar.
- Fold in the hazelnut and almond powders until combined.
- Fill the batter into the piping bag, pipe onto the parchment paper starting in the middle of the circle piping a spiral.
- Scatter the chopped almond on top.
- Bake for approx. 30 minutes until golden brown.
- Let cool.
Chocolate Hazelnut Praliné Mousseline
- Whisk together the butter and 80g of the praliné in a bowl until smooth.
- Add the chocolate pastry cream and combine until homogenous.
Assembly
- Trim the Dacquoise disks to the same size if necessary.
- Prepare the second piping bag with the piping tip, fill with the Mousseline.
- Pipe the Mousseline onto one of the Dacquoise disks.
- Place the second Dacquoise disk on top. If it is difficult to remove the Dacquoise from the parchment paper, turn it upside down and peel it of carefully.
- Dust with codi neige (which does not melt in the fridge) or icing sugar just before serving.