Preheat oven to 350 degrees. Spray an 8-by-8-inch baking dish with butter-flavored cooking spray.
In a large bowl, combine great northern beans, onion, salsa, and tomato soup. Stir in Brown Sugar Twin, black pepper, and bacon bits.
Mix well to combine. Pour mixture into prepared baking dish. Bake for 60 minutes. Place baking dish on a wire rack and let set for 3 to 4 minutes. Divide into 6 servings.