What is that white fussy and hairy mold growing on blue cheese?

The white, fussy, and hairy mold growing on blue cheese is Penicillium Roqueforti. It's not just any mold, but a specific type that's intentionally added to the cheese during the cheesemaking process.

Here's why it's important:

* Flavor and Aroma: This mold is responsible for the characteristic pungent, salty, and slightly spicy flavor of blue cheese. It also contributes to the distinctive blue-green veins that give blue cheese its name.

* Texture: The mold helps create the crumbly, slightly creamy texture of blue cheese.

* Safety: Unlike most molds, Penicillium Roqueforti is safe to eat in moderate amounts. It has been used in cheesemaking for centuries and is a crucial part of the blue cheese flavor profile.

So, while it may look a bit fuzzy and hairy, it's actually a key ingredient that gives blue cheese its unique flavor and texture.