The Mac 'n Cheese pizza is literal keeping it real mac n cheese. Cheddar and all. Make it just like you'd make it at home (not the Kraft stuff though...sorry) and throw it on a regular pizza crust apparently. Life = changed. You're welcome.
Also, it can be found in it's natural habitat for viewing/tasting parties at CiCi's Pizza.
Go forth and be merry my friends.