Preheat oven to 200°C for 10 minutes. Grease a 12 cup ring mould.
Beat the oil,milk,sugar and vinegar for 10 minutes on high speed till it's became frothy and fluffy.
Now Sieve Maida,baking powder, baking soda together for 2-3 times in a utensil.
Now take half milk batter, half all purpose flour, pineapple essence and mix it together.make sure there should be no lumps.
Now take half batter of milk add in to cocoa powder and mix it.
Take the greased utensil and alternatively pour the batter with a spoon over one another. Make the design. Sprinkle some chocolate chips on top.bake at preheated oven 180 degree for 45 minutes.
