While the cooker gets preheated, we will prepare the cake batter.
Take a big bowl or cake tin and grease it with oil or ghee.
Dust it with maida or in other words sprinkle some maida over the bowl or cake tin.
Take the grinded oreo biscuit in another big bowl.
Gradually, add ½ cup of milk of normal temperature in the above mixture and mix very well to make a good quality batter of running consistency or a smooth paste.
At this stage, you can also add chocolate nuts to the batter for some extra taste.
Add 1 pouch of eno to the batter.Add 1 teaspoon of milk over eno for batter fermentation.
Mix the above mixture very well.(The batter should not be too watery or thick. It should fall like a ribbon.)
Immediately place this mixture into the big bowl or cake tin greased earlier.
Tap the bowl gradually from the sides so that the batter settles down perfectly.
Remove the lid of the cooker and place this big bowl or cake tin in the heated cooker. (Be careful as the cooker is hot)
Cover the lid of the cooker without the whistle.
Cook on low flame for 40 minutes.
After that, remove the lid of the cooker and check the cake. (Insert a toothpick into the cake. If it comes out clean, it means the cake has cooked well. If the batter is stuck on the toothpick, cook again for another 5 minutes.)
Take out the cake tin from the cooker carefully and cool down for 10-15 minutes.