Note: If you don’t have buttermilk on hand, just use milk, fat content up to you. Add in just like the buttermilk, holding some back.
Mix all ingredients except buttermilk. Slowly add buttermilk, holding back a little , stirring and adding more as you wish, gauging until the ranch reaches the consistency you want. Let sit for 20 minutes. Stir, taste and adjust to your liking.