1 tsp baking powder
225g/8oz caster sugar
100驳/3陆辞锄 caster sugar
350g/12oz caster sugar
录 tsp cream of tartar
250g/9oz icing sugar
225g/8oz self-raising flour, sifted
陆 tsp vanilla extract
100驳/3陆辞锄 walnuts, finely chopped
10 walnut halves
225g/8oz butter, softened, plus extra for greasing
125驳/4陆辞锄 butter, softened
4 large free-range eggs, beaten
2 large egg whites
2 tbsp milk