In a bowl, mix together the mayonnaise, mustard, and ketchup until combined.
Stir in the horseradish, lemon juice, vinegar, salt, sugar, cayenne pepper, and soy sauce.
Cover the bowl and refrigerate it for an hour before using it. Enjoy!
Notes
For best results, prep all ingredients before starting this burger king zesty sauce. Taste as you go and adjust seasoning or sweetness to your preference. Store leftovers properly and enjoy within a few days for the best texture.