450g/1lb strawberries, chopped
225g/8oz caster sugar
250g/9oz icing sugar, plus extra for dusting
225g/8oz self-raising flour
300g/10Β½oz jam sugar
vanilla extract
65²µ/2ΒΌ΄Η³ϊ butter
4 free-range eggs
225g/8oz margarine
1 tbsp milk