It’s the egg batter. There’s a dish called Chicken French (or Chicken Francese) where you dip a chicken cutlet in egg batter and fry it. Or French ice cream, which is made with eggs. Basically when you hear a meal with the word French it means eggs were added.
My most recent fair going experience was the New York State Fair last summer. At various points I had a sausage sandwich, fried ravioli, and a lobster roll.
At the Alameda County Fair last week I was commenting that it must be a sign that I’ve grown up. When I was a kid I wanted to eat everything at the fair, now I can hardly find anything I’d be willing to eat. Finally settled on a turkey leg, which was suprisingly edible, but mostly just because I felt like I should eat something after going all the way out there.
But I do miss living in a part of the country where I can get an elephant ear (grew up going to the Clark County (Washington) Fair. Funnel cake don’t cut it (and the occasional option of Indian fry bread ain’t quite right).
I can’t say that your folks weren’t using straight butter, rather that most don’t and enjoying the broad terms of the Pro-tip user agreement, these butter buckets are often butter floating on hot water. The end result is probably pretty much the same.