Here is my recipe for Ranch Dressing and, thanks to Brielle, a video showing how to make it.
HOMEMADE RANCH DRESSING
1 1/2 cups Kefir (or buttermilk)
2 cups mayonnaise
1 teaspoon garlic powder
1/2 teaspoon coarse fresh ground black pepper
2 teaspoons parsley
2 Tablespoons dried onion flakes
1/2 teaspoon celery salt
1/2 teaspoon Real Salt or sea salt
Blend well, refrigerate. It will taste even better after a couple of hours. Keeps well for several weeks.