First take grinded oreo put sugar and baking powder in it and mix it well. Than put milk in it and stir it.Mix it well than take cooker put out whistle and rubber of cooker than put salt and than put a stand on salt in cooker take a bowl than Grease it with butter or oil than put that mixture in that bowl and place it in cooker.

Than cover the cooker without closing the cap of cooker.

Than wait for 30 min. Than your cake is ready. Decorate it with your choice.