300²µ/10½´Ç³ú plain flour, plus extra for dusting
175g/6oz caster sugarÌý
½ tsp ground cinnamonÌý
pinch saltÌý
60g/2¼oz granulated sugar
375g/13oz dark chocolate, broken into pieces
50²µ/1¾´Ç³ú dark chocolate, peeled into shavingsÌý
50²µ/1¾´Ç³ú white chocolate, peeled into shavingsÌý
115g/4oz unsalted butter
250g/9oz unsalted butter, cut into cubes
2 tbsp double creamÌý
300ml/10fl oz double cream
4 free-range eggs
1 free-range egg yolk
3 free-range egg yolksÌý