Cilantro Ranch Dressing

I had this salad dressing at a church activity. It was so good that I had to ask for the recipe.

1 packet Hidden Valley Ranch Dressing (not buttermilk)
1 cup Mayonnaise
1 cup buttermilk
3 tomatillos (remove husk)
1/2 bunch fresh cilantro
Garlic to taste
 Juice of 1 large lime
1 jalapeno (leave seeds if you like it spicy)

Place everything in the blender or food processor and process until the mixture is smooth.

Note: It makes a lot of dressing