Combine ingredients with ice in cocktail shaker; shake well, then strain into cocktail glass. Garnish with rosemary sprig.
The platinum blonde is an infused cocktail made from vodka, citrus and herbal liqueur. The cocktail has a citrus–herbal flavor profile, and is often flavored with rosemary and elderflower.[1][2][3] It is similar to the classic cloister cocktail, which calls for gin and chartreuse.[4]