Take yogurt, sugar in a bowl and whisk till creamy and sugar is melted.

Now add in oil and vanilla and whisk well.

Add in sooji, cocoa and mix well. Set aside for 5 mins.

Now add in water and mix well.

Add in baking soda and mix well.

Add in flour and fold gently.

Now spoon this in a well greased idli plate and steam for 5 to 7 mins. Insert a toothpick to check whether the cake is done.

Now remove and let it cool for a min.

Use a spoon to remove it and serve