Add the meats to a large Dutch oven, or other heavy bottomed pot, set over medium heat. Cook, stirring often and breaking apart, until all the meat's have completely browned. Strain off all the grease.
2 lbs lean ground beef, 2 lbs ground sausage, 1/2 lb bacon
Add the onion, chili seasoning, and cocoa powder to the pot stirring until evenly combined. Let the mixture cook for 2 minutes.
1 large sweet onion, 2 pkts chili seasoning, 1 tbsp unsweetened cocoa powder
Add the rest of the ingredients to the pot and stir until everything's well combined.
1 10 oz can diced tomatoes with green chiles, 1 8 oz can tomatoes paste, 2 stems celery stalks, 4-5 cups diced bell peppers, 1 15 oz can diced fire roasted tomatoes, 1 1/2 cups finely chopped matchstick carrots, 2 cups beef broth
Bring the chili to a boil, then immediately reduce the heat to a simmer.
Cover and cook, stirring occasionally, for 3-4 hours.
Ladle into bowls, and serve warm with your favorite toppings.