1 ounce fresh juice from 1 pink grapefruit
1 1/2 ounces Fremont Mischief Whiskey
1/2 ounce simple syrup
Garnish: grapefruit wedge (optional)
Fill a cocktail shaker 2/3 full with ice.
Add grapefruit juice, whiskey, and simple syrup. Shake vigorously until well chilled, about 20 seconds.
Strain into ice-filled rocks glass, garnish with grapefruit wedge if desired.