Preheat the oven and prepare the crust by mixing gingersnap crumbs, brown sugar, and melted butter. Press into a springform pan.
In a large bowl, blend cream cheese, sugars, spices, corn starch, molasses, sour cream, vanilla extract, and eggs until smooth. Pour over the crust and bake in a water bath.
Once baked, cool and refrigerate the cheesecake.
Whip the cream, powdered sugar, and cinnamon for the topping. Pipe rosettes on the cheesecake, slice, and serve with salted caramel sauce.