In a cocktail shaker, add 2 fluid ounces of vodka, 2 fluid ounces of sour apple schnapps, 1 fluid ounce of lemon juice, and 1 fluid ounce of simple syrup.
Add a few ice cubes to the shaker and shake it vigorously for about 30 seconds.
Take a chilled martini glass and strain the cocktail mixture into the glass.
Garnish the Appletini with a few apple slices and serve.
Notes
You can adjust the sweetness of the Appletini by adding more or less simple syrup according to your taste.
If you don't have a cocktail shaker, you can use a mason jar with a lid to mix the ingredients.
For a little sparkle, add a splash of sparkling water or soda to the mixture before shaking it up.
Enjoy the delicious and easy-to-make Appletini at your next party. Cheers!