I googled and found the recipe from Hellmann's website, the producer of mayonnaise who has created recipes which uses the mayo.
The mayo chocolate cupcake (which I have been making) is good - moist and springy, so naturally I was drawn to this one. I wanted to have something for non-chocolate lover (strange enough, they exist!)
Sadly this one didn't make the mark - the cupcake turned out to be so heavy and dense. I am so sad that my expensive cranberries and walnuts are gone for good :-(