Spoon some room-temperature caramel sauce on a plate. Roll the rim (or part of the rim) of a champagne flute in the caramel to coat the rim.
Place apple cider and caramel vodka in the champagne flute. Top with champagne.
Garnish with apple slices.
Notes
Make sure to chill your champagne and apple cider ahead of time. Champagne is fizzier when it's cold. Use room-temperature caramel sauce for the rim — if it’s too cold, it won’t adhere or drip well. If it is too hot, it will drip too fast and be messy.Don't overload the rim. Too much caramel will drip too much and will make the outside of the glass sticky. (This is important if you are using stemless champagne flutes.)