I finally came up with what we think is the perfect recipe for Hot Buttered Rum. I love research...*
Place a teaspoon of butter in the bottom of an Irish coffee mug (or similar). Add a teaspoon of brown sugar, a shake of cinnamon, a slightly smaller shake of freshly grated nutmeg, and a little less ground allspice (of course, these spices can be altered to your taste). Use a spoon to mix the sugar and spices into the butter. Add 1½ ounces of dark rum and 2 teaspoons of orange juice; fill the glass with hot water. Stir. Garnish with a cinnamon stick or an orange slice.
I used Gosling's rum, but Meyer's would be just as good as long as it's a dark (not white or gold) rum.
*- must qualify that-- I love rum research. A friend enjoys her job doing microgenetics research. To each her own.