Take a mixing bowl put condensed milk and oil mix it very well.

Sieve all purpose flour, cocoa powder,baking soda, baking powder.

Add dry ingredients in wet ingredients mix it very well add vanilla essence amd mix it.

Preheat the cooker grease the baking tin put the chocolate cake batter in it bake it for 50 minutes.

For chocolate sauce in a pan add corn flour, cocoa powder, sugar and milk boil it until it becomes thick.

Demould the cake when it is cool pour the chocolate sauce over it.