In a large pot, cook the ground beef, sausage, and chopped onion over medium-high heat until the meat is completely browned. Drain off excess fat with paper towels.
Add chili powder, cumin, paprika, cayenne pepper, salt, pepper, and garlic. Saute for one minute, or until fragrant.
Stir in the water, bouillon, Worcestershire, brown sugar, crushed tomatoes, and diced green bell peppers. Add the beans.
Bring to a boil. Turn the heat down to low and simmer uncovered for 45-60 minutes, stirring occasionally.
Chili thickens as it simmers, so cook it until it is the desired consistency. We like ours thick, so I cook it for the full 60 minutes.
Garnish with sour cream, cheese, and green onions if desired.