This drink knocked me on my ass last night.
1 1/2 oz. blended scotch whiskey
1/2 oz. aged rum
1/2 oz. fresh lime juice
1/2 oz. Royal Rose Strawberry-Fennel Syrup
1/2 dropper-full Bittercube Jamaican #1 bitters
splash of pear or peach nectar
Combine ingredients over ice and shake vigorously. Strain into a chilled cocktail glass. Resist the urge to guzzle.