There’s no mystery about the origin of this third sauce: Alabama’s unique white barbecue sauce. The place was Decatur, Ala., where “Big” Bob Gibson, a railroad man and barbecue buff, began ...

1 cup Kewpie mayonnaise; ¼ cup apple juice; ⅓ cup apple cider vinegar; 2 tbsp. lemon juice; 1 tbsp. garlic powder; ½ tbsp. Dijon mustard; 2 tsp. fresh cracked pepper ...

In Alabama, the state’s signature sauce is a punchy, peppery, mayo-based condiment first popularized in 1925 at Big Bob Gibson’s Bar-B-Q in Decatur, one of the oldest smoke joints in the country.

The sauce is a little like ranch dressing, except fuming with garlic and spice. And it is delicious — in the way that onion dip is delicious.

A 6-foot-4, 300-pound railway worker, in the mid-1920s "Big" Bob Gibson began cooking in the backyard of his two-story, four-bedroom Danville Road home before he ever thought of opening a restaurant.