This burger is plant-based but not vegan by default. The extra $2 to make it vegan is for vegan cheese; maybe also for vegan trucker sauce? As they list "vegan trucker" under dipping sauces, I interpret that to mean their normal trucker sauce is not vegan.
I got this as a meal, and asked for the chips to be vegan but i noticed they came with chicken salt. 🙄 They cooked me some more chips without chicken salt.
VEGAN