Shake whiskey, lemon juice and maple syrup in a cocktail shaker filled with ice. Strain into a glass filled with ice. Add hard apple cider and garnish with apple slice and ground cinnamon.
Notes
Toss the apple in some lemon juice so it doesn't brown.
Used crushed ice which will make the cocktail colder quicker.
Add a cinnamon stick and then you can use it as a straw.