Preheat your oven to 356°F (180°C). Line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the cake flour, baking powder, and salt.
Add the cold, cubed butter to the dry ingredients. Using a pastry cutter or your fingertips, work the butter into the flour mixture until it resembles coarse crumbs.
Add salted caramel sauce, whipping cream, and egg. Gently mix until just combined. Be careful not to overmix; a slightly shaggy dough is fine.
Divide the dough into six equal portions. I opted not to use a cookie cutter for shaping. For a more aesthetically pleasing result, transfer the dough onto a floured surface and gently shape it into a rectangle approximately 1 inch (2.5 cm) thick. Then, use a round cookie cutter to obtain six portions.
Place the scones on the prepared baking sheet, leaving some space between each.
Bake in the preheated oven for 20-25 minutes or until the scones are golden brown and cooked through.
Remove the scones from the oven and, while they are still warm, spoon a dollop of salted caramel sauce over the tops. Place a small cube of butter on each scone.
Allow the scones to cool on a wire rack for a few minutes before serving. By then, the butter will have slightly melted, making it easy to spread over the scones.