1/2 cup mayonnaise
1/2 cup sour cream
1/4 cup buttermilk
1 tablespoon chopped fresh parsley
1 teaspoon chopped fresh dill
1 teaspoon chopped fresh chives
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
Add more buttermilk to thin if needed
Taste and adjust seasoning
Chill before serving