In a cocktail shaker without ice, combine the bourbon, lavender syrup, grapefruit juice, ruby red grapefruit wedges, grapefruit bitters and mint leaves. Muddle everything thoroughly, and add ice. Shake to chill the liquid, and strain into a highball glass filled with fresh ice. Top it all off with a splash of grapefruit soda, and garnish with lavender stick and mint sprig.
Originally written by RootsRated for Visit Bardstown.