Season the beef. Season the beef with salt and pepper.
Brown the beef. Heat the olive oil in a large, heavy-bottomed pot or Dutch oven over medium-high heat. Add the beef to the pot and cook until browned on all sides, stirring occasionally. DO NOT crowd the pan. You will likely have to brown the beef in batches.
Add the veggies. Stir in the onion and jalapenos and sauté until the onion becomes translucent.
Season. Add the garlic powder, cumin, and smoked paprika to the pot. Stir everything together and cook for 1-2 minutes.
Add the tomatoes and kidney beans. Stir in the crushed tomatoes, fire-roasted tomatoes, kidney beans, and stock.
Stew. Allow the chili to come to a simmer, reduce the heat to low, cover the pot, and cook for 2 hours, stirring occasionally.
Thicken. Whisk together the masa harina and water to form a paste and stir it into the chili. Simmer for an additional 10-15 minutes.
Adjust the seasoning. Taste the chili and adjust the seasoning with salt and pepper if needed.
Notes
Ground beef. Feel free to use ground beef instead of beef stew meat. You can use it in the same way, just make sure to break it up as you brown it. You will likely have to brown in batches.
Masa harina. The masa harina will make the chili nice and thick. You don’t have to use it though. You can leave it out altogether or use a slurry of 2 tablespoons of cornstarch and 2 tablespoons of water to achieve similar results. Just note that you won’t get the subtly sweet flavor that the masa harina contributes.