2 ounces gin (such as Beefeater)
1 ounce fresh lemon juice
2/3 ounce simple syrup
Small bunch basil leaves (about 10)
Basil sprig, for garnish
Muddle basil leaves with lemon juice and simple syrup. Add ice and gin and shake. Double-strain into a chilled cocktail glass with ice. Garnish with a basil sprig.