3/4 oz. St. Germain elderflower liqueur
1 1/2 oz. Hendrick’s Gin
3/4 oz. fresh-squeezed lime juice
1/4 oz. simple syrup
Fresh mint leaves
In a cocktail shaker, combine St. Germain, gin, lime juice, simple syrup, cucumber slices, and several mint leaves. Using a muddling tool or wooden spoon, crush ingredients together. Add ice, cover, and shake vigorously. Pour into a Mason jar and top with tonic water.