Take a pan hot the milk.

Now add coco powder. Mix well.

When milk boil,take another small bowl add corn flour and 1 tbsp cold milk.

Mix well.

When milk boil add corn flour mixture.

Mix it well and boil.

Then rest it for till then it is cold.

Take a tray place one biscuit cover it with mixture.

Then again place another biscuit.and layer it.

Cover with aluminium foil.

And refrigerator for 4 to 5 hours.

Then cut the slice. And serve it