I've been making this for several years and it is a hit. Eat with chips or on quesadillas, fajitas....
1 c. mayo
1 c. buttermilk
1 c. sour cream
1 packet Ranch Dressing (not dip)
1 bunch cilantro (or less)
1 pickled jalapeno (optional)
Blend all together. Will last for a week in refrigerator.