Barefoot Contessa (en-US)

From the cookbook:

Barefoot Contessa At Home

3/4 cup Jack Daniel’s Tennessee Whiskey
1/2 cup freshly squeezed lemon juice (3 lemons)
1/2 cup freshly squeezed lime juice (4 limes)
2/3 cup sugar syrup
Maraschino cherries

Combine the whiskey, lemon juice, lime juice, and syrup. Fill a cocktail shaker halfway with ice, and fill two-thirds full with the cocktail mixture. Shake for 30 seconds and pour into martini glasses. Add a maraschino cherry and serve ice cold.

Fresh Whiskey Sours