Tarragon brightens the flavor of this from-scratch lemonade; add gin to easily turn it into a summery cocktail.
Combine the sugar with 1 cup water and 6 sprigs tarragon in a small saucepan. Bring to a boil, stirring until sugar is dissolved. Remove from heat and let cool to room temperature.
In a large pitcher, combine lemon juice, tarragon-sugar syrup, and 3 cups of cold water. Fill pitcher with ice until ready to serve.
To serve, fill glasses with ice. Pour a shot of gin over the ice, if using. Fill with lemonade and garnish with a tarragon sprig.