Chocolate orange cupcakes

This is recipe from BBC Food.

Ingredients

• 120 g plain flour
• 140 g caster sugar
• 1 tsp baking powder
• 40 g butter
• 50 g dark chocolate, melted
• 1 egg
• 125 ml milk
• 1 orange, juice only
• 3 tbsp granulated sugar
• Buttercream:
• 125 g butter
• 250 g icing sugar
• dash of melted chocolate

Preparation method

• Preheat the oven to 170C. Line a 12-hole muffin tin with paper cases.
• Mix the flour, sugar and baking powder together. Add the butter and puls until combined.
• Whisk the melted chocolate, egg and milk together in a jug.
• Stir the chocolate mixture into the flour mixture until just combined.
• Spoon the mixture into the cases and bake for 15-20 minutes.
• Meanwhile, mix the orange juice and granulated sugar together in a bowl. 
• Beat the butter in the bowl and add the icing sugar.
• Pour the cupcakes with orange juice icing. Then decorate the cupcakes with buttercream and pour it with melted chocolate.

Source