做法： METHOD:

Preheat oven at 170c. Prepare and grease a 8 inch round cake pan.
Sift flour and baking powder. Set aside.
Beat eggs, flour mixture, castor sugar and emulsifier (ovalett) on high speed for 10 minutes* or until batter turns light and creamy, i.e. thick ribbon state. **To test, lift beater. Batter drops from beater should disappear when you count from 1 to 10.
Pour in melted butter, condensed milk and vanilla essence (if any). Mix at slow speed.
Divide batter into 2 equal portions. Fold in chocolate solution into one of the batter.
Using small soup ladle (original recipe from Jo's used spoon, I tried it with spoon before and it failed to produce a nice pattern lines on the cake) Scoop 3 of uncoloured batter into center of the greased cake pan. Then, scoop 3 of chocolate batter onto the center of the plain batter you just scooped into the pan.
Repeat until you have finished about half of the batter. Reduce to 2 scoops each now and continue layering. Reduce the amount of batter gradually until you only pour 1 scoop of each batter finally. The circles become smaller and smaller as your pour (Pic. 4).
Sprinkle almond nibs or flakes to cake. Bake at 170c for 35-40 minutes or until the skewer insert comes out clean.
Let cake in pan for 10 minutes before turning it on to a wire rack to cool complete before we cut and serve it.

p/s: I bake this cake at 160c and it takes me 40 mins to get the cake all cooked throughly. Different oven might need different temperature and time for baking a cake. Please take note**