In northern Alabama, barbecue simply isn’t worth eating without a tangy white sauce the chief ingredients of which are vinegar, mayonnaise, and black pepper — the way it’s served at the popular Big Bob Gibson’s in Decatur, Alabama. My own contribution to the recipe is a blast of prepared horseradish. It isn’t traditional, but I like its kick.
Step 1: Place the mayonnaise, vinegar, horseradish, if using, 2 teaspoons of salt, 2 teaspoons of black pepper, and the cayenne in a very large nonreactive mixing bowl and whisk to mix.
Step 2: Transfer this white barbecue sauce to an attractive small nonreactive serving bowl. It pairs perfectly with pork or chicken.