Marble Cake

For the umpteenth times, typhoon swept through the city. Watch the evening news, there was a girl blown away by the typhoon from her 3rd floor apartment. Terrible isn't it?
I and friends planning for hiking this weekend, but the weather just wouldn't compromise heheee. So instead of wandering around in the danger, i'd better stay at home and doing some baking.
Most of my cakes are round and bored looks, it is because i only have 2 kind of round baking pan, and i know nothing about cake decorating(well....i have a lot of cake decorating tools, but no idea how to use it hahaaa...) i should take the decorating classes someday...
Got this recipe from the back of self raising flour package that i bought few days ago. It is soft and not too sweet according to my taste.

Ingredients:
200 g self raising flour
230 g butter
200 g castor sugar
230 g eggs
1/2 tsp vanilla essence
30 g cocoa powder
50 ml milk

-Cream butter with self raising flour into smooth paste. In separate bowl, beat egg and sugar until spongy add egg mixture to the butter mixture, add in vanilla essence and beat until smooth.
Divide the batter into 2. Add milk and cocoa powder to one portion, leave the other one plain. Scoop the batter alternately to the lined baking pan and bake at 180 for 50 mins.