Using a large bowl, combine the ground beef, baking soda, salt, and a tbsp of water. Mix thoroughly with your hands, set aside for 20-25 minutes.
Chop, dice or mince the onion, bell pepper, garlic, and oregano.
Using a large pan with a thick bottom, heat 2 tbsp oil over medium heat. Add the onions, red peppers, and garlic; cook 3-5 minutes or until soft, stir frequently.
Increase the temperature to high and add the beef. Chop the beef into bite size chunks while stirring with a wooden spoon. Cook until beef is browned, usually about 10 minutes or so. DO NOT DRAIN LIQUID FROM PAN.
Add the cumin, smoked paprika, oregano, cinnamon, and sugar; cook stirring often for 1-2 minutes. Stir in the yellow cornmeal, broth, crushed tomatoes, tomato paste, and molasses, bring to a boil. Add the ancho pepper and the chipolte peppers, leaving them whole. Reduce heat to low and simmer covered for about 2 hours.
Remove the ancho and chipolte peppers. Skim the excess fat off the surface of the chili. Stir in the lime juice, taste and adjust seasoning according to your taste.
If you prefer a thinner chili, add water, stock or broth. To thicken the chili, continue simmering, uncovered, until desired consistency is achieved.
Ladle into bowls and top with your choice of sour cream, cilantro, avocado, scallions, grated cheese, and a lime wedge. A great side for this chili is cornbread muffins.