From September 28 through Halloween Day, the burger giant is offering its popular patty sandwich inside a pitch-black bun that's flavored with A.1. sauce and sprinkled with white sesame seeds. The burger comes loaded with the usual Whopper fixings (melted American cheese, pickles, white onion, tomato and mayonnaise) but this one also has a dash of A.1. sauce—something I don't think I've tried in over 20 years. The verdict: it's kinda, sorta...well...okay, really good. The black bun has the squishiness of a Martin potato roll and a tiny hint of black pepper that's a good complement to the smoky charcoal-broiled...