I'd assume it's just aereosolized vegetable oil... it is a bit of a weird question so maybe the waitress didn't understand?
I haven't actually been to one before... sounds like it'd be fun to try once, but not somewhere I'd go regularly or seek out.
I always assumed that Waffle House’s food is Sysco-sourced. If so, how is it not a chemical amalgamation from a soulless corporation?
The last time I visited a Waffle House, and I ordered fried eggs, I was curious what kind of oil the eggs were fried in (sunflower, rapeseed, whatever). The waitress then showed me some horrible aerosol can that looked totally synthetic and didn’t name any particular source for the oil.
Nowadays, when I travel the American South, I prefer to go to eateries for the local Mexicans and other Central American immigrants (they are there if you look for them); there most of the ingredients seem fresher, less processed.