Add hot chili powder, cumin, coriander, oregano, chipotle peppers, tomato paste and tortilla, cook, stirring until the tomato paste turns red-brown, about 4 minutes.
If the mixture begins to stick, add a little water. Then pour in coffee and simmer, for about 30 seconds. Stir in tomatoes, cocoa powder, beans, 2.5 tbsp. water and bring to a boil.
Reduce heat and simmer over low heat, stirring occasionally, until thickened, about 1 hour 30 minutes.