Firehouse Chili and Cornbread Casserole

Ingredients (22)

• + 1 tablespoon olive oil add to pantry
• ✓ 1 yellow onion, diced
• + 2 teaspoons kosher salt, or more to taste add to pantry
• + 2 pounds ground beef add to pantry
• + 2 tablespoons all-purpose flour add to pantry
• + ½ cup diced poblano pepper add to pantry
• ✓ 3 cloves garlic, crushed
• + 3 tablespoons chili powder add to pantry
• ✓ 2 teaspoons ground cumin
• + 2 teaspoons freshly ground black pepper add to pantry
• + ½ teaspoon cayenne pepper add to pantry
• + ½ teaspoon dried oregano add to pantry
• + 1 (15 ounce) can fire-roasted diced tomatoes add to pantry
• + 1 (15 ounce) can fire-roasted crushed tomatoes add to pantry
• + 2 cups water, or as needed add to pantry
• + 1 (16 ounce) can kidney beans, rinsed and drained add to pantry
• + 2 (7.5 ounce) packages corn muffin mix (such as Jiffy®) add to pantry
• + 1 cup grated white Cheddar cheese, divided add to pantry
• + 2 large eggs add to pantry
• + 1 cup milk add to pantry
• + ¼ cup sour cream, or to taste add to pantry
• + ¼ cup chopped fresh cilantro, or to taste add to pantry