Chocolate custard mille feuille

Pastry cream

• 50 g cornflour
• 20 g caster sugar
• 220 g full cream milk
• 20 g unsalted butter
• 2 eggs
• 1 tsp natural vanilla extract
• 50 g dark chocolate, broken into pieces

Puff pastry

• 250 g plain flour, plus extra for dusting (see Tips)
• 200 g unsalted butter, chilled, cut into pieces
• ½ tsp sea salt
• 2 tsp lemon juice
• 100 g water, chilled

Assembly

• icing sugar, for dusting
• 50 g fresh raspberries, (approx. 12)