Whisk butter with sugar powder until mixed. Gradually add milk,1/2 cup wheat flour, baking soda and baking powder mix until well combined.

Divide batter into 2 pats, add cocoa powder into one of them,mix well.add 1/2 cup of wheat flour into another also mix well.

Grease a round cake tin.pour a little bit of dark batter in the middle of cake tin.then pour a bit of light batter in the middle of the dark. continue in the same way unti all the batter is poured.

Tak a knife and draw 4 lines on the batter by moving the knife from the center to the side.then draw another 4 lines now by moving the knife placed between the first line.this is the zebra parten.

Place the cake tin inside the preheated cooker and now slow down the flame and cook on a low flame around 34-40 minutes,Or until a toothpick inserted into center of cake comes out clean.

Remove from the cooker,allow to cool. enjoy.