Prepare fettuccine noodles according to directions on the package.
Melt together all Alfredo ingredients. Bring to a boil. Reduce heat and simmer until noodles are done.
Drain noodles, and add to sauce.
[My 2 Cents]
The leftovers do not reheat well, if at all possible don't have leftovers. If you need to half the recipe. There is so much butter that when you try to reheat the sauce is VERY greasy!
Adapted from My friend, Wendy