Creamy Avocado Buttermilk Dressing, this is a wonderful combination of all the things I love, avocados, sour cream, buttermilk, garlic and mayonnaise. So easy to make, combine the ingredients in a food processor and blend until smooth. That is it, can’t get any easier than that. I love this dressing poured over the top of nachos, it is such a light and creamy dressing adding just the right stuff to nachos or any mex recipe. I is so much better than adding clumps of sour cream, where I seem to get to much of a clump or not enough. Creamy Avocado Buttermilk dressing just pours over so smoothly and covers with just right amount of creaminess.