3 peeled apples, chopped
icing sugar, to taste
300g/10oz self-raising flour
150g/5oz granulated sugar (caster is fine but slightly changes consistency of sponge)
1 tbsp sunflower oil
50g/2oz butter
lightly whipped double cream, to serve
3 large eggs
100ml/3fl oz milk
100ml advocaat, or to taste (optional)