Take a big pressure cooker or idli cooker and add in the salt. Now place a wire stand and a perforated plate over it.
Cover and remove the whistle(if using pressure cooker) or loosen the whistle if using idli cooker.
Heat this up in med flame.
In a mixing bowl, add the plain flour or maida, powdered sugar, choco chips, cocoa powder, corn flour, baking soda. Mix well.
In another bowl, add the milk, oil, lemon juice, and vanilla and mix well.
Add the wet mixture to the dry ingredients and mix well.
Take individual muffin moulds bars had coats! or silicone moulds.
I add the batter to 6 moulds. Now transfer this to the cooker and bake for about 30 mins in med flame. I baked in two batches.
Once baked let them cool before icing, or enjoy them warm as it is!