To make cheesecake mixture, take cream cheese and powdered sugar in a bowl and mix lightly. Whisk with a blender till light and fluffy.
Add whipped cream and fold well. Set aside.
To make the base, grind cookies to a fine powder. Transfer to a bowl, add butter and mix well.
To make salted caramel, heat sugar in a non-stick pan with some water till it caramelizes. Add fresh cream and mix well. Add butter and mix well on low heat. Add sea salt and mix well. Remove from heat and set aside to cool.
Line the cheesecake tin with the base mixture and press well. Drizzle some salted caramel on top.
Top with cheesecake mixture and spread evenly. Drizzle the remaining salted caramel and use a toothpick to give a marble effect. Sprinkle very little sea salt on top and refrigerate till set.