Add water, tomatoes, cumin, chili powder, paprika, onion flakes, garlic powder and pepper. Simmer, covered, for ½ hour stirring occasionally.
Make a roux from the flour and a bit of water….start with 1 tablespoon and increase to a thick but pourable consistency. Add roux to chili. Cover and simmer for an additional 20 minutes. Chow down, toots!