Heat a large skillet over medium-high heat and cook the bacon until crispy. Transfer to a plate lined with a paper towel but keep the drippings in the pan. Sautee the onions in the bacon fat until translucent, about 3 minutes.
Add the baked beans, molasses, brown sugar, mustard, Worcestershire sauce, and crumbled bacon, and stir until well combined. Bake for 45 mins.