Combine all the ingredients into a food processor. Process until the dressing is smooth. Taste. Add salt to taste. The amount you need depends on how salty your blue cheese is.

If you find the dressing is too thin, add more mayo a little at a time and re-process until thick. If you find the dressing is too thick, then add a little milk at a time and re-process until thinner.

Best enjoyed the day you made it or within a couple days.