In a medium-sized bowl, combine 1 cup of mayonnaise with 1/2 cup of sour cream.
Give it a good mix to ensure both are well incorporated.
Pour in 1/2 cup of buttermilk.
Stir gently until the mixture is nice and smooth.
Add 1 tablespoon of ranch seasoning mix to the bowl.
This is what gives the dressing its classic flavor.
Sprinkle in 1 teaspoon each of garlic powder and onion powder.
These spices add depth to your dressing.
Mix everything thoroughly until you’ve achieved a creamy consistency.
Chill in the refrigerator for at least 30 minutes before serving.