First together all ingredients,grease the cake tin.keep aside.

In medium size bowl combine the maida (all-purpose flour) baking powder and baking soda.sift this mixture three times to ensure even distribution and aeration.
In another bowl
Mix together the oil and sugar until well combined.
Gradually add the sifted dry ingredients to the oil and sugar mixture stirring continuously.
Pour in the milk and mix until the batter is smooth and uniform.

Devied tha batter in ti two equal part
To one part add mango pulp and mix until well incorporated To another part mix vanilla extract and mix throughly

Preheat cooker for 5minutes,grease the suitable cake pan,pour two tablespoons vanilla batter in to the pan,tap gently to spread evenly,next add two tablespoons mango batter on top and tap again.
Reaper this process,three times.

Place the cake pan in the preheated cooker,bake for 25 minutes.once baked,remove the cake pan from the cooker,let cool and place on wire rack,after the cooker has cooled,slice and serve it.