Creamy Cilantro Tomatillo Dressing

Cafe Rio inspired!

1 package dry hidden valley ranch salad dressing
1 cup mayo
1/2 bunch cilantro
1 large clove garlic
3 small-medium tomatillos, husk off (like tomatoes but green and has a husk on it)
1/3 cup buttermilk (substitute 1 tbsp. white vinegar with 1 c. milk)
juice of 1 lime
1/4 tsp red pepper flakes (or 1 small jalapeno) - optional
Place all ingredients in a blender and blend until smooth. Chill in fridge at least 1 hour before serving, then it will thicken.