To make Homemade Ranch Dip: Mix together ¼ cup of the ranch seasoning mix recipe along with 1 cup of regular sour cream or dairy-free sour cream and 2 tablespoons of milk of choice or buttermilk for an even richer taste. Homemade Ranch Dressing Mix 1 cup of mayo with ¼ cup ranch seasoning 1/4 cup sour cream, and ½ cup milk of choice or buttermilk and 2 tsp apple cider vinegar.