Apple cake with brown butter icing

400g (14oz) cooking apples, peeled and grated

75g (3oz) butter (6 tbsp)

250g (9oz) caster sugar

2 large eggs

225g (8oz) plain flour

½ tsp salt

1 level tsp baking soda

2 rounded tsp cinnamon

grating fresh nutmeg

50g (2oz) lightly toasted walnuts, optional

For the icing:

75g (3oz) butter

175g (6oz) icing sugar, sieved

3-4 tbsp milk

½ tsp vanilla extract

Equipment 

2 x 20.5cm (8 inch) round cake tins OR 1 x 20.5cm (8inch) wide x 5cm (2 inch) deep genoise tin