With flavors this fresh, you will never buy store-bought ranch dressing again!
Whisk together the buttermilk and mayonnaise in a mixing bowl.
Gently fold in the parmesan cheese, garlic, lemon zest and spices into the buttermilk and mayonnaise mix with a spatula until well blended.
Transfer to a serving dish or jar and refrigerate for at least 30 minutes. The longer the flavors mingle, the better the flavor.
Serve with your favorite green salad or as a dip for veggies! Enjoy!