This scotch honey whiskey essence by Fermfast is similar to Drambuie⃦ . Pour the contents of this bottle and 1.25 cups (250 g) of granulated sugar into a 34 fl. oz. (1 L) bottle. Fill with 26 fl. oz. (750 mL) of 25-30% alc./vol. grain alcohol, neutral vodka. Shake until the sugar has completely dissolved. If desired, thicken with 1 fl. oz. (29 mL) of glycerin. Makes 31 fl. oz. (900 mL).