First make custard,take small bowl take 1/4 portion of cold milk and mix custard powder,coco powder and drinking chocolate in another vessel boil milk and add mixed liquid and condensed milk and let it boil 3-4 minutes and then cool in fridge

Make whipped cream

Now boil little water and add instant coffee to it,dip biscuit in it

Put first layer of biscuits,second layer of custard,third layer of whipped cream repeat this process

Let it cool in refrigerator for 4-5 hours or overnight