151 Swizzle

Place 1 cup crushed ice in a Collins glass; add lime juice, simple syrup, Pernod, Angostura bitters, and 3 tablespoons (1 1/2 ounces) of the demerara rum, and stir rapidly until frost forms on the outside of the glass, about 30 seconds. Top with remaining 1/2 tablespoon (1/4 ounce) rum, and sprinkle with cinnamon.