01 -
Preheat your oven to 350°F (175°C).
02 -
Cook the ground beef in a large skillet over medium heat, breaking it up as it cooks. Once browned, drain any excess fat.
03 -
Add the onion and bell pepper to the skillet with the beef, cooking until the vegetables soften, about 5 minutes.
04 -
Stir in the Worcestershire sauce, brown sugar, mustard, ketchup, water, salt, and pepper. Let the mixture simmer for approximately 5 minutes until it thickens slightly. Add more water if needed to reach the desired consistency.
05 -
Combine the corn muffin mix, milk, vegetable oil, and egg in a mixing bowl. Stir just until the ingredients are incorporated; the batter will be slightly lumpy. Set this aside.
06 -
Spread the sloppy joe mixture evenly in a greased 9x9-inch baking dish. Pour the cornbread batter over the top, spreading it out to cover the beef mixture.
07 -
Bake in the preheated oven for 25 to 35 minutes, or until the cornbread is golden brown and fully cooked.
08 -
Immediately sprinkle the shredded cheddar cheese on top of the casserole as soon as it comes out of the oven, allowing it to melt over the cornbread.
09 -
Let the casserole rest for a few minutes before serving to make it easier to cut and serve.