Yes, you can use dairy like cream, yogurt, or buttermilk in a vinaigrette. It will make the vinaigrette creamier, thicker, and less acidic.
Adding dairy to a vinaigrette fundamentally changes its texture and flavor profile. Traditional vinaigrettes rely on an emulsion of oil and acid (like vinegar or lemon juice), creating a light and tangy dressing. Dairy introduces fat and protein, which contribute to a richer, smoother consistency.
Here's how different dairy products affect the vinaigrette:
When incorporating dairy, it's best to whisk it in gradually to ensure a smooth emulsion. You may also need to adjust the amount of acid (vinegar or lemon juice) to balance the flavors, as dairy can mellow the acidity.
Dairy-based vinaigrettes are best used immediately or stored in the refrigerator for a short period (1-2 days). They tend to separate over time, so whisk well before serving. Avoid freezing, as the texture can become grainy.