01 -
Choose either a slow cooker or an oven-safe deep casserole dish or dutch oven for cooking. Ensure all tools are clean and ready to use.
02 -
Chop the uncooked bacon into small pieces. Using medium heat, brown the bacon in a heavy cast-iron skillet or dutch oven, stirring with a wooden spoon. Transfer crispy bacon to a small bowl using a slotted spoon, leaving the bacon drippings in the pan.
03 -
Add the chopped onion to the pan and cook in the bacon drippings for 5-6 minutes until translucent. Add the minced garlic and stir for an additional minute.
04 -
Add the ground beef to the pan with the onion and garlic. Cook for 6-8 minutes until browned and fully cooked.
05 -
Return the cooked bacon to the pan with the ground beef, onions, and garlic. Stir in the baked beans (not drained), kidney beans (drained), cannellini beans (drained), and black beans (drained).
06 -
Add brown sugar, apple cider vinegar, ketchup, and yellow mustard to the pan. Stir until all ingredients are thoroughly combined.
07 -
Transfer the mixture to a slow cooker or an oven-safe casserole dish. Slow cook on low heat for 2 hours or bake at 350°F (175°C) for 1 ½ hours with the dish covered.
08 -
Serve the prepared baked beans hot. Ideal for picnics, parties, or as a side dish.