Combine the chili powder, cumin seeds, cayenne, cinnamon, oregano, bay leaves, and brown sugar in a small bowl; set the spice mixture aside.

Add the beef to a medium bowl and season with the pepper and 1 tablespoon of the kosher salt.

Heat 2 tablespoons of the vegetable oil in a 12-inch or larger skillet over high heat. Add enough beef to fill the pan and cook until nicely browned on one side, about 2 minutes. Turn the pieces over and cook for another 2 minutes. Transfer the browned beef to the crock of a 6-quart slow cooker. Repeat with the remaining beef, adding the remaining vegetable oil between batches as necessary.

Add the onions, celery, and 1 tablespoon of the remaining salt to the skillet and cook, stirring, until the vegetables begin to soften, about 2 minutes. Add the garlic, jalapeños, and spice mixture and cook for 1 minute longer. Pour in the beer, tomato paste, and crushed tomatoes and simmer for 3 minutes. Stir in the chocolate, masa harina, and remaining 1½ teaspoons salt and cook for 1 minute longer. Transfer this mixture to the slow cooker. Cover and cook the chili on high, undisturbed or stirring only once during cooking, for 6 hours, or until the beef is very tender. Remove the bay leaves and stir in the cilantro and parsley. Serve the chili hot in bowls, topped with grated cheddar, chopped green onion, and sour cream.

Garnish with grated cheddar cheese, chopped green onion, sour cream

Chef's note: Come and get it! The real-deal chili is right here. Large chunks of beef chuck steeped in spices and cooked slowly in tomatoes, beer, and a bit of chocolate create a succulent mouth feel. Serve this up in bowls garnished generously with sour cream, grated cheddar, and green onions for a true home-on-the-range feeling.