Chocolate chip marmalade cupcakes

125g of unsalted butter, softened

semi-skimmed milk, 1-3 tbsp

125g of caster sugar

2 large eggs

125g of self-raising flour

1 pinch of salt

50g of dark chocolate, chopped into small chunks

100g of marmalade, with peel (orange), plus extra for spooning

80g of icing sugar

1 tsp baking powder

1 tbsp of orange juice, freshly squeezed