In a large bowl add the whipped cream amd whip it on low for 3 minutes.
Add cardamom powder and slowly start adding condensed milk in parts and whipping at the same time till very soft peaks are formed. Takes about 3-4 minutes on low medium speed of hand beater. If you feel that the cream is getting warm, immediately refrigerate it for 30 minutes and continue again. More chilled the cream, better it whips.
Line the container in which you want to make the cake. I used a 7 inch by 7 inch (4.75 cup) glass container. Use ny kind of baking tray or cake pan, rectangular is better since then you wont have to break the cookies to fit.
Add a layer of cover to cover the base, followed by 1 inch layer of whipped cream smoothen out with a spatula or back of spoon, sprinkle some desiccated coconut and then add about 1/2 cup diced mangoes. Repeat to form 3 or 4 layers depending on how thick you like the cake finsihing with cream layer on top.
Cover with a cling film amd chill the cake for atleast 6 hours. You can freeze it as well overnight. I like chilled version more, its softer, if you like to freeze it, peel away the parchment, slice off using a sharp knife and then let it thaw for 10 minutes since that makes it melt in the mouth :)
Slice and serve. Enjoy!