Fill a cocktail shaker halfway with ice cubes.
Add the Irish whiskey, fresh lime juice, and simple syrup to the shaker.
Shake well for about 15-20 seconds, or until the ingredients are thoroughly mixed and chilled.
Strain the mixture into a tall glass filled with fresh ice.
Top off the cocktail with club soda, pouring gently to maintain the fizz.
Give the drink a gentle stir to combine everything.
Garnish with a lime wheel and a sprig of mint to add a touch of freshness.
Enjoy your Blarney Stone Fizz immediately, sipping on its crisp and fizzy goodness!