1/2 ounce simple syrup
1/4 ounce heavy cream
1 teaspoon unsalted butter, softened
6 ounces hot water
Cinnamon stick, to garnish (optional)
In a heat-safe glass or mug, combine the rum, simple syrup, heavy cream, and butter. Top the glass off with the hot water and stir to melt the butter. Garnish with a cinnamon stick, if desired, and serve.
In association with Rachael Ray at www.rachaelray.com