What the what is nutritional yeast? Well, let's first call it nooch, which sounds a whole lot better. This wonderful stuff is a type of yeast made from beet molasses and sugar cane. It is not the yeast used to make bread rise, or any other yeast you might be thinking of. It's loaded with B-vitamins, has a cheesy savory flavor, and widely used for it's deliciousness in vegan recipes. mmmmmm...noooooooch