Let dressing sit overnight to meld flavors.
Recipe information
Yield
makes 1 1/2 cups
Ingredients
1
/2 cup mayonnaise
1
/2 cup sour cream
2
tablespoons buttermilk
1
tablespoon white-wine vinegar
1
teaspoon Worcestershire sauce
1
bunch chives, coarsely chopped (1/2 cup)
2
green onions, coarsely chopped
2
tablespoons chopped fresh cilantro
2
tablespoons chopped fresh flat-leaf parsley
1
teaspoon sugar
1
teaspoon coarse salt
1
/2 teaspoon freshly ground black pepper
Pinch of cayenne pepper (optional)
Need to make a substitution?
Preparation
Combine all the ingredients in a blender or food processor; process until smooth. Refrigerate in an airtight container up to 3 days.

Reprinted with permission from The Martha Stewart Living Cookbook: The New Classics by Martha Stewart Living Magazine, copyright © 2007. Published by Clarkson Potter, a division of The Crown Publishing Group.
Buy the full book from Amazon.