1 cup mayonnaise
1/2 cup sour cream
1/2 cup buttermilk
1 teaspoon dried dill
1 teaspoon dried parsley
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
1/4 teaspoon salt
1/4 teaspoon black pepper
1 teaspoon lemon juice or white vinegar
Whisk all ingredients together until smooth
Taste and adjust seasoning
Refrigerate for at least 30 minutes before serving