Same as Wes -> Mayo in a chocolate cake? Damn, does not sound very good at first glance.
The final result looks pretty tasty, I wish I had cooking skills, but I have a cousin who will most likely like to try making this someday. (Maybe without the mayo? I told him that this recipe have mayo and his face wasn't good)
This is another recipe with Mayo https://www.hellmanns.com/ca/en/recipes/super-moist-chocolate-cake.html