It characterizes Caramel taste, which is formed by caramel syrup, irrespective of molasses, butter, or salt. Butterscotch is primarily made of brown sugar and butter and is so amazingly tasty for this purpose.
There was a misunderstanding. The brown sugar makes the molasses it has a more nuanced taste similar to granular sugar which is used in caramel.
Butter sweets often have a tougher time than chocolate sweets that are mostly soft and chewy.
