Cafe de olla
Café de olla is a traditional Mexican coffee beverage. To prepare café de olla, it is essential to use a traditional earthen clay pot, as this gives a special flavor to the coffee. This type of coffee is principally consumed in cold climates and in rural areas. In Mexico, a basic café de olla is made with ground coffee, cinnamon, and piloncillo. Optional ingredients include orange peel, anise, and cloves.
Source: Wikipedia
