2 dashes pink food colouring
400g/140z caster sugar
1kg/2lb 4oz icing sugar
400g/14oz self-raising flour, plus extra for dusting the tins
3 tbsp vanilla extract
400g/14oz salted butter, at room temperature, plus extra for greasing the tins
500g/1lb 2oz salted butter, at room temperature
8 large free-range eggs, lightly beaten
2 dashes milk, optional