I know it's completely basic, but I've been reading up on alternative ways to make chicken wings (admittedly because I've been trying to find a similar recipe to Korean soy garlic chicken) and I came across this recipe from Momofukufor2.
It mentions rendered chicken fat, and I'm not exactly sure what that meant. I'm familiar with twice fried wings, so is this just another way of saying "the oil you cooked the wings the first time around"?