Muddle the Apples and Mint: In a cocktail shaker, add the apple slices and mint leaves. Use a muddler to gently press them together, releasing their juices and flavors.

Add the Liquids: Pour in the whiskey, fresh lemon juice, and simple syrup.

Shake Well: Fill the shaker with ice and shake vigorously for about 15 seconds to chill the mixture and combine the flavors.

Strain into Glass: Strain the mixture into a rocks glass filled with ice. You can use a fine-mesh strainer if you prefer a smoother drink without any fruit pulp.

Garnish and Serve: Garnish with a lemon wheel and a mint sprig if desired. Enjoy your refreshing Apple Whiskey Smash!