Melt the oil in a stockpot over moderate heat.
Add the stewed beef and cook until thoroughly browned.
Add the crushed garlic and sliced sweet onion. Allow the onion to soften.
Stir in tomato paste, salt, pepper, chili powder, cumin powder, brown sugar, and smoked paprika. Ensure all ingredients are well combined.
Add vinegar, tomatoes, beans, and jalapenos. Stir and simmer covered for 23-26 minutes, stirring occasionally.
Let the chili cook for an additional 10 minutes.
Add flour and stir for 3 minutes to thicken the chili.
Turn off the heat and allow the chili to cool before serving. Top with shredded cheese and chopped red onion. Optionally, serve with sour cream, avocado slices, and tortilla chips.