Sieve maida with baking powder and baking soda at least twice and keep aside. In a bowl cream the butter and sugar till light and fluffy. Add milk and mix well until creamy.

Add vanilla essence, condensed milk and give a quick stir. Then add maida, mix well to form a smooth batter.

Take 1/4 of the prepared batter, add cocoa powder and hot water, mix well and keep aside. Now both the batters are ready.

.Preheat oven to 170C for 10 minutes. Meanwhile grease a baking pan(I used my bread loaf pan) with butter and flour. First pour half of the vanilla batter and add half of the chocolate batter in circles as shown below. Then with a fork make marble like patterns - don't overdo. Again add the remaining vanilla batter , chocolate batter in circles and make marble like patterns with a fork / knife.

.Can you see the swirls? Now bake the cake at 170 DEG C for 40-45 minutes or until a fork inserted at the center of the cake comes out clean. Cool down the cake for 10mins then invert. Cut down into slices and enjoy.

The slices were a bit huge so I cut it down further into half while serving. The original recipe called for orange zest for extra flavor but I skipped it as I wanted a plain chocolate vanilla flavored cake.