What is the difference between rocka cheese and blue cheese?

There's no cheese called "rocka cheese." It's likely a misspelling of Roquefort cheese.

Here's the difference between Roquefort cheese and blue cheese:

* Roquefort is a specific type of blue cheese. It is made from sheep's milk and has a strong, pungent flavor with a creamy texture. It is also known for its distinctive blue veins, which are caused by a mold called *Penicillium Roqueforti*.

* Blue cheese is a broader category of cheese that includes Roquefort, as well as other cheeses with blue veins, such as Gorgonzola (made from cow's milk) and Stilton (made from cow's milk).

Key Differences:

* Milk: Roquefort is made exclusively from sheep's milk, while other blue cheeses can be made from cow's, goat's, or even a blend of milks.

* Flavor: Roquefort is known for its intense, pungent flavor, while other blue cheeses can range in flavor from mild to strong.

* Texture: Roquefort has a creamy texture, while other blue cheeses can be crumbly or soft.

* Production: Roquefort cheese is made in the Roquefort-sur-Soulzon region of France, and only cheese produced in this region can be called Roquefort. Other blue cheeses are produced in various regions around the world.

So, while both Roquefort and blue cheese have blue veins and a pungent flavor, Roquefort is a specific type of blue cheese with a unique flavor and texture, thanks to its strict production regulations and the use of sheep's milk.