Fill the clay pot (or a regular pot if a clay one is unavailable) with water.
Add piloncillo (or brown sugar) and cinnamon sticks to the pot.
Heat the mixture on a medium flame until the piloncillo dissolves completely.
Once dissolved, add the freshly ground coffee.
Reduce the flame and allow the coffee to simmer for about 5 minutes.
Remove from heat and let it stand for a couple of minutes, allowing the coffee grounds to settle at the bottom.
Strain the coffee while serving to avoid the grounds.