Fudgy Chocolate Layer Cake 

3 oz (75g) plain chocolate
7 floz milk
9 oz (225g) dark brown sugar
3 oz (75g) butter
2 eggs
½tspn vanilla essence
5 oz (125g) plain flour
1 oz (25g) cocoa
1 tspn bicarbonate of soda

Put the chocolate, milk, and 3 oz (75g) of sugar into a saucepan. Heat
gently until chocolate and sugar  have melted. Allow to cool. In a large
bowl, beat the remaining sugar with the butter until pale and  creamy.
Gradually beat in the eggs, vanilla, and chocolate milk. Gently fold in
the flour and bicarb',  using a figure-of-eight action to incorporate as
much air as possible. Turn into two greased and lined  sandwich tins and
bake Gas Mark 4, 350ºF/180ºC for 30 - 35 minutes. Turn out onto a wire
rack and  leave to cool completely. Cover with Rich Chocolate Icing (see
below). Top with grated chocolate.

Rich Chocolate Icing 

4 oz (100g) butter
7 oz (175g) icing sugar
1 tblsp milk
4 oz (100g) melted chocolate

Beat the butter and icing sugar until light and fluffy. Gradually mix in
the melted chocolate and milk.  Use to sandwich cakes (using one third)
and smother the rest all over the top and side of cake.