Step 1

For Demerara Syrup:

Step 2

Mix two cups Demerara (natural brown) sugar with one cup water in a small saucepan over medium heat. Stir until the sugar is completely dissolved. Cool before using. As an alternative, place one or two brown sugar cubes in your rocks glass and allow to dissolve in the drink.

Step 3

For Rum Old Fashioned:

Step 4

Combine rum, syrup, and bitters in a mixing glass with large ice. Stir vigorously and strain into a double rocks glass over one large ice cube. Garnish with orange twist.