Ingredients

1 cup reduced-fat mayonnaise1/2 cup reduced-fat sour cream1/2 cup buttermilk1 teaspoon onion powder1 teaspoon cider vinegar1/2 teaspoon garlic powder1/2 teaspoon salt1/8 teaspoon pepper

Preparation

Place all ingredients in a blender or food processor; cover and process until smooth. Cover and refrigerate for at least 1 hour before serving.