Toss the cubed beef chuck with the flour. Add the oil to the pan and sear the beef until browned on all sides. Add the onions and jalapeños. Cook until vegetables are soft and add the garlic. Cook for one more minute and transfer the mixture to your slow cooker. Add the rest of the ingredients and stir.
Cook the chili on low heat for 7-8 hours until chili is thick and rich. Serve with desired toppings.