Pour the apple cider into a saucepan and place over medium heat.
Add the salted caramel sauce to the warm cider and whisk gently until fully dissolved and the mixture is smooth.
Continue to heat the mixture, stirring occasionally, until it begins to bubble gently and is steaming hot.
Pour the hot cider into mugs, swirling slightly to create a glossy caramel ribbon on the surface.
Sprinkle a tiny pinch of sea salt on top of each serving to enhance the salted caramel flavor.
Serve immediately while steaming hot, with optional cinnamon sticks or extra caramel for garnish.