*Cinnamon/Sugar rim is optional: pour a little Fireball in a shallow dish and mix some cinnamon and sugar in another shallow dish. Dip an empty glass first in Fireball then in cinnamon/sugar mixture.
Brew fresh coffee. Mix coffee and pumpkin puree while it is hot until all combined.
Add Fireball and Rumchata to the coffee glass and pour in coffee mixture.
Add some Sweet'N Low to taste. (I'd start with 1/2 packet per glass and taste.)