Preheat your oven to 350°F and get all your ingredients prepped and ready. Dice your bacon, onion, and bell pepper.
In a large skillet, cook the 10 slices of bacon over medium heat until crispy. Once cooked, remove the bacon and place it on a paper towel to drain. Reserve a few tablespoons of the bacon fat in the pan.
Add the diced onion and ½ bell pepper to the skillet with the bacon fat. Sauté for about 5 minutes, until softened and translucent.
In a large bowl, whisk together the 4 tablespoons ketchup, ¼ cup molasses, ⅔ cup brown sugar, ¼ cup cider vinegar, and 2 teaspoons dry mustard.
In a large baking dish or Dutch oven, combine the drained 54 oz of beans, sautéed onions and pepper, crispy bacon, and the sauce. Stir until everything is well combined
Cover the baking dish with aluminum foil and bake in the preheated oven for 1 hour. After an hour, remove the foil and continue baking for an additional 15-20 minutes to let the top caramelize slightly.
Once the beans are done, give them a final stir and serve hot.