Mix all of the ingredients together in a small bowl until well combined. Store in an airtight container.
Use whenever a recipe calls for dry ranch seasoning packets or mix. (2 tablespoons of this mix is equivalent to one store-bought ranch dressing packet.)
To make Ranch dressing, simply mix 1/4 cup of dry ranch seasoning mix with 1/2 cup sour cream or Greek yogurt, 1/2 cup mayo, and 1/2 cup buttermilk. Chill in the refrigerator before serving.