I can remember a burger joint in Billings Montana that served these small burgers, you got each for a dime, and a bag of a dozen cost you a dollar. We’d take them by the bag full to the drive-ins, and eat like kings for a buck!
Come to think of it, they had that crinkly paper too! I sort of think we were conditioned to get hungry if we heard paper crinkle in that way, Pavlov Mutts for sure.
Those sound like White Castle Sliders, Johnn. I make them at home, like this:
(And, yes! I use the jar of baby food - and hot dog buns cut in thirds.)