Vegan cheese artisans are mastering the flavor of nut cheeses. The process requires a fermentation cycle of 8 hours to a couple days. The longer a nut cheese ferments, the better depth and “cheesy” odor. The flavor is added during fermentation, which at Dr. Cow cheese shop in Brooklyn includes nut cheese flavors like reishi mushroom spores, blue-green algae and saffron and truffles.