Bring the sugar and water to the boil at 117°C and add the hazelnuts.
First sand the mix then caramelised to become a praliné.
Add the kaffir leaves and cool on a Silpat®.
Roast the butter to beurre noisette.
Mix the praliné in the Robot-Coupe, keep it coarse.
Put the mixture in the blender with the paddle attachment and work it in first gear so the praliné start to oil.
Add the melted milk chocolate, cocoa butter, the beurre noisette and finish with the milk powder.
Temper at 24°C and pour in the frame that is previously stencilled.