Low Point Homemade Ranch Dip/Dressing using homemade buttermilk

My low point homemade ranch dressing using homemade buttermilk.
First, you make the buttermilk
1/2 cup of 1% fat milk (2 smart points) add 1 tbsp of white distilled vinegar. Mix and let stand at room temp for 10 mins. After it will be a bit thick.
To make Dish with Dee's Homemade Buttermilk Ranch Dressing
1/2 cup of low-fat buttermilk of choice
1 cup of NF plain greek yogurt
2 Tbsp of low-fat mayo
1 packet of ranch dressing powder mix

1/4 tsp of xantham gum ( if you want a thicker dressing ) 

Mix all ingredients in a jar and refrigerate for 2 hours.
Points for this ... 1 tbsp is zero smart points 2-4 tbsp(1/4 cup) is 1
smart point. 5-8 tbsp is 3smart points.