1/2 cup mayonnaise
1/4 cup sour cream
2 Tablespoon milk
1/2 Tablespoon dried parsley
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
Salt to taste
Combine mayo, sour cream, and milk.
Add dry ingredients and whisk together.
Thin if necessary with a little more milk or water.
Refrigerate in covered container.
Makes about 1 cup.