1. Gather all ingredients.

2. Preheat oven to 350 degrees F (175 degrees C). Cook ground beef on a large skillet over medium-high heat until browned, 5 to 8 minutes. Remove from skillet and reserve.

3. Cook bacon in the same skillet 5 minutes.

4. Add onion and green pepper to skillet. Cook, stirring frequently, until bacon is crisp and onion is translucent, about 5 minutes.

5. Add ground beef, brown sugar, ketchup, Worcestershire sauce, and mustard to the bacon mixture; stir until combined.

6. Add ground beef mixture and beans to a 13x9-inch baking dish, stir to combine.

7. Bake until bubbly, 40 minutes.