1/2 shot fresh cucumber juice* (you’ll need a cucumber whether you make the juice or just muddle it)
1/2 lime, juiced
1/4–1/2 shot mint (or basil) simple syrup* (adjust amount to your sweetness preference)
club soda (about 1-2 shots, depending on how large of a glass you are using)
Make the cucumber juice: Peel a cucumber (I used an English cucumber) and cut it up into chunks. Put in blender and blend until smooth. You can use the puree if you like, but I prefer to strain it through a fine mesh strainer to remove the pulp and just use the juice.
Make the mint or basil simple syrup: Combine equal parts sugar and water (I typically use 1 cup), bring to a boil, reduce and add a big handful of mint or basil. Simmer a couple minutes, remove from heat and let cool. Once cooled, strain out the mint or basil and store simple syrup in refrigerator.
Make the cocktail: Combine gin, St. Germain, cucumber juice, lime juice and simple syrup in cocktail shaker with a bit of ice. Shake well and strain over tall rocks glass filled with ice. Top with club soda
*You can substitute the cucumber juice with a few pieces of cucumber to muddle, but I recommend making the juice! *This is equally delicious with mint or basil so get wild and give them both a try and see which you prefer!