1 1/4 oz of grand marnier orange liqueur (or orange liqueur)
1 splash of simple syrup
1 1/4 oz of bourbon whiskey
1 splash of club soda (or clear soda)
Shake the bourbon, Grand Marnier and simple syrup together with crushed ice in a cocktail shaker. Strain into an old-fashioned glass 1/2 filled with ice cubes. Top with soda, and serve.