01 -
In a medium bowl or large measuring jug, whisk together mayonnaise, whole grain mustard, horseradish, ketchup, lemon juice, parsley, chives, Creole seasoning, garlic, Worcestershire sauce, and optional sugar until completely blended.
02 -
Cover the bowl and refrigerate the sauce for at least 30 minutes to 1 hour before serving to allow the flavors to meld for best taste.
03 -
Serve cold as an accompaniment for seafood, vegetables, sandwiches, or burgers.