Muddle blackberries, tarragon leaves, simple syrup and lime juice in the bottom of a mixing glass. Add Ketel One Vodka and shake with ice. Double strain into a Collins glass filled with ice. Top with club soda. Garnish with a lavender sprig.
All drink recipes within this site contain no more than 0.6 fl. oz. (14 grams) of alcohol per serving, equivalent to one standard U.S. drink. For more information on alcohol content, please visit http://www.drinkiq.com