Take a mixing bowl add curd, sugar, oil and mix well

Now mix atta, baking powder, baking soda and milk powder and mix properly without any lumps and u get a smooth batter

Then divided the batter into two equal parts

In one part add coco powder and mix it well

Now Grease and dust a baking tin or dish and firstly pour the half of white batter then pour chocolate batter and lastly again pour white batter, tap it 2 to 3 times so that it spread equally

Keep it in a preheated cooker and cover the lid, bake it on low flame for 45 minutes

After that check with a knife, if knife comes out clean then cake is ready, if not then bake for another 5 to 10 minutes

Let's cool down and cut in your desired shape and enjoy

Note......When u bake in pressure cooker u should bake without rubber and whistle