Combine all the ingredients in a bowl and mix well.
Serve immediately or refrigerate until ready to serve.
Notes
Use full-fat mayo: It gives the sauce a richer texture and better flavor than low-fat versions.Balance the sweetness: Taste the sauce and adjust with a dash of vinegar if it’s too sweet from the ketchup.Whisk until smooth: Make sure all ingredients are fully blended for a creamy, lump-free consistency.Let it chill: Refrigerate the sauce for at least 30 minutes before serving to let the flavors meld together.