- 2/3 cup mayonnaise
- 1/4 cup minced onion
- 3 tablespoons minced dill pickle
- 2 tablespoons pickle brine
- 2 tablespoons distilled white vinegar
- 1 tablespoon prepared white horseradish
- 1 tablespoon sugar
- 1 teaspoon kosher salt
- 1/2 teaspoon celery seeds
- 1/2 teaspoon freshly ground black pepper
- Whisk all ingredients in a medium bowl to blend. DO AHEAD: Can be made 1 day ahead. Keep chilled.