Step 1

If serving the drink straight up, place a 4-ounce or larger stemmed cocktail glass (such as a coupe or Nick and Nora) in the refrigerator or freezer to chill. If serving on ice, fill an old-fashioned or rocks glass with ice.

Step 2

Halve 1 medium lime. Cut a thin round from one half and reserve for garnish. Juice the remaining lime halves until you have 3/4 ounce. Place the lime juice, 2 ounces gin, and 3/4 ounce simple syrup in a cocktail shaker. Add enough ice to fill the shaker halfway. Seal the shaker and shake vigorously until the outside of the shaker is frosty, about 20 seconds.

Step 3

Pour through a strainer into the glass. Garnish with the lime wheel.