1In a large skillet over medium heat, cook the ground beef until browned, breaking it apart with a spoon as it cooks.
Add the chopped onion and green bell pepper to the skillet. Cook until the vegetables are tender, about 5 minutes.
Stir in the tomato sauce, ketchup, Worcestershire sauce, brown sugar, and chili powder. Mix well to combine.
Reduce the heat to low and let the mixture simmer for about 10 minutes, stirring occasionally.
Toast the hamburger buns if desired.
Spoon the sloppy joe mixture onto the bottom halves of the hamburger buns. Top with the other halves of the buns.
Serve hot and enjoy your Classic Sloppy Joe!