1 orange, grated zest
2 oranges, grated zest only
1 orange, grated zest only
200g/7oz plain flour, plus extra for dusting
3 tbsp cocoa powder
cocoa powder, for dusting
50²µ/1¾´Ç³ú icing sugar
75²µ/2½´Ç³ú milk chocolate, broken into pieces
1 tsp vanilla extract
150²µ/5½´Ç³ú dark chocolate (70 per cent cocoa solids), broken into pieces
150²µ/5½´Ç³ú unsalted butter, chilled and cut into small pieces
300ml/½ pint double cream
1 free-range egg, beaten
2 free-range eggs, beaten