Rich Marbled Chocolate Cake

From the book "Crazy For Chocolate", this cake is soft yet rich, just nice!
Not so friendly to my kids' taste bud though, I guess it's because of the rum taste...

  

What you need:

125g dark chocolate, chopped
125g butter
125g caster sugar
2 eggs, lightly beaten
155g self raising flour
80ml milk
1 tbsp brandy (I don't have brandy so I use dark rum)
1/2 tsp vanilla essence

Chocolate icing:
(I didn't use, too lazy on that day, perhaps next time)

100g white chocolate, chopped
4 tbsp cream
100g dark chocolate, chopped

1. Preheat oven to 180degC
2. Brush a deep 8" round pan with melted butter
3. Place chocolate in heatproof bowl, stand bowl over pan of simmering water, stir til melted, remove from heat
4. Using mixer, beat butter and sugarin a bowl til light and creamy. Add eggs gradually, beating thoroughlyafter each addition
5. Transfer mixture to bowl, fold in with metal spoon sifted flour alternatively with milk. Add rum and vanilla, stir til combined. Divide mixture in two, add melted chocolate to one portion and mix well
6. Spoon the two mixtures alternatively into the pan. Swirl mixtue with skewer. Bake 40minutes or until skewer comes out clean when inserted in centre. Leave cake to cool

To make the chocolate icing:

1. Place white chocolate and 2 tbsp cream in a small heatproof bowl, stand bowl over a pan of simmering water, stir til smooth. Repeat with the dark chocolate and remaining cream. Place alternate blobs of mixtures on top of the cake. Swirl with a skewer for a marbled cook