Preheat the oven to 375 degrees Fahrenheit. Cook 6 ounces diced bacon in a medium-sized skillet over medium heat until crispy. Remove the bacon with a slotted spoon, then add 1 medium diced onion to the pan and cook until tender.
Add the cooked bacon and onions to a 9 x 13-inch baking dish along with 4 (15.5-ounce) cans navy beans, 1 cup chicken broth, ½ cup brown sugar, and salt and pepper. Stir to combine.
Cover the dish with foil and bake for 45 minutes. Remove the foil and bake for an additional 10-15 minutes, until the beans have thickened.
Notes
Leftover Instructions
Fridge: Store in an airtight container in the fridge for up to 5 days.
Freezer: Freeze in an airtight container for up to 3 months. Thaw overnight in the refrigerator before reheating.
Make Ahead: These beans are perfect for making ahead. The flavor gets better the next day. Make them 1–2 days ahead, let them cool, and store them covered in the refrigerator. Reheat them in the oven, on the stove, or in a slow cooker until warmed through.