Superman Cheese
One of my personal favorites is the Superman Cheese, a.k.a. "Superman Pastuerized Process Imitation Cheese Spread" is from 1967.  I would imagine that it was something like "Velveeta," except so very much more.  Unfortunately the box is empty so the taste of Superman Cheese has been lost to the ages.

Super Hero Food Freaky Recipe:  Combine this item with Batman Tortilla Chips and you get Justice League Nachos!!  (Or if you like, "World's Finest" Nachos)  You could even spice it up with Kryptonite Hot Sauce!!