Place 1/2 cup mayonnaise, 3 tablespoons ketchup-style chili sauce, 1 tablespoon minced white onion, 1 teaspoon prepared horseradish, 1/2 teaspoon Worcestershire sauce, 1/2 teaspoon smoked paprika, 1/2 kosher salt, 1/4 teaspoon dry mustard, and 1/4 teaspoon black black pepper in a medium bowl and stir to combine. Taste and add more kosher salt or black pepper as needed.