Break the bourbon biscuits into small pieces and add them into a blender

Melt the dairy milk chocolate using the double boiling method and grind the biscuits nicely

In a mixing bowl, first, add the bourbon biscuit and add a pinch of baking soda next add one spoon powdered sugar if you like more sugar, otherwise, you can avoid it and make a batter by adding milk little by little and there should not be any lumps in the batter and it should be in the cake batter consistency.

Add some batter in the idli plate and next add one tsp melted chocolate on it and again add some batter on top of it and pressure cook it in the idli cooker or kadai for some 7 - 8 minutes and remove them and some melted chocolate on top of the idli and serve it.