Boil the Fettuccine (100 gram) in water seasoned with Salt (to taste).
In a large bowl add the Butter (50 gram) and place on top of the boiling water to start the melting process and remove.
Add the fettuccine to the bowl and mix with the butter. Add in splashes of the pasta water to the fettuccine and mix. Slowly add in the Pecorino Romano Cheese (1 cup) and continue to mix. You might not need the whole cup of cheese, but you want a creamy sauce to form from the mix of melted cheese, butter, and starchy pasta water. Keep adding more water if it seems too dry.
Serve and top with more cheese. Enjoy!