Heat the cream and milk in a saucepan. Beat the eggs and 100 g sugar with the whisk of the hand mixer until white-creamy. Carefully stir in the cream mixture and chestnut purée. Rinse 10 flat oven-proof glasses (each with a capacity of approx. 200 ml) in cold water.
Place on a baking tray. Pour the mixture into the glasses and cook in the preheated oven (electric cooker: 150 °C/ circulating air: 125 °C/ gas: see manufacturer) for approx. 30 minutes. Take out of the oven, let it cool down on a cake rack for approx. 1 hour, cover with foil and put in a cool place for approx. 3 hours.
In the meantime, boil up 2 tablespoons of sugar with 4 tablespoons of water in a pan and let it boil down like syrup. Add the chestnuts and caramelise while turning until golden brown. Place on a plate lined with baking paper and allow to cool.
Sprinkle chestnut cream with cane sugar, caramelise with a gas burner until golden brown. Spread the chestnuts on top. Decorate with raspberry sugar.