1 orange, juice only
1 orange, zest only
120g/4oz plain flour
1 tsp baking powder
140g/5oz caster sugar
250g/9oz icing sugar
3 tbsp granulated sugar
100g/3陆oz orange chocolate
50g/2oz dark chocolate, melted and cooled slightly
50驳/1戮辞锄 white chocolate, melted
40g/1陆oz unsalted butter
125g/4陆oz unsalted butter, softened
1 free-range egg
125ml/4fl oz milk
2-3 tbsp milk