• Step 1: In a medium-sized bowl, whisk together the mayonnaise, sour cream, white vinegar, and white sugar until well combined.
• Step 2: Add the Dijon mustard, salt, and black pepper, and continue whisking until the dressing is smooth and creamy.
• Step 3: Taste the dressing and adjust the seasoning if necessary, adding more salt, pepper, or sugar to achieve your desired flavor profile.
• Step 4: Cover the bowl with plastic wrap and refrigerate the dressing for at least 30 minutes to allow the flavors to meld together.