Prepare the Glass: If desired, rim your martini glass with sea salt by dipping the rim in water and then into the salt.
Mix the Drink: In a cocktail shaker, combine vodka, apple schnapps, salted caramel syrup, and apple cider.
Shake: Add ice cubes and shake vigorously until well chilled.
Serve: Strain the mixture into the prepared martini glass.
Garnish: Drizzle caramel sauce over the top and add a slice of apple to the rim.
Enjoy your Salted Caramel Apple Martini!