2 unwaxed lemons, finely grated zest plus 2 tbsp juice only
4 tbsp lemon juice
275g/9¾oz plain flour
2 tsp baking powder
225g/8oz caster sugar
50g/1¾oz golden caster sugar
50g/1¾oz ground almonds
½ tsp vanilla extract
50ml/2fl oz sunflower or vegetable oil
100g/3½oz unsalted butter, melted
2 large free-range eggs
150ml/¼ pint semi-skimmed milk