Straight from my Italian friend. This Alfredo is rich, creamy, and delicious! Do not skimp on the cheese. You want really good quality cheese for this dish, as it's the star of the show! Add grilled chicken or shrimp, if desired. I usually serve steamed broccoli and garlic bread on the side.
Authentic Fettuccine Alfredo
1/2 c butter
2/3 c light cream (I use half and half)
1 1/2 c freshly grated Locatelli Pecorino Romano cheese
1/4 c chopped fresh parsley
1 lb. fettuccine
Salt and pepper
Cook pasta according to package directions. Meanwhile, melt butter over low heat. Gradually add in cream, stirring well. When pasta is nearly cooked, slowly add cheese into butter and cream, stirring continually until smooth. Remove from heat.
Drain pasta, reserving 2/3-3/4 cup of the water. Do not rinse pasta.
Return sauce to low heat, adding in pasta water until the sauce reaches desired consistency. (You want it thin enough to be "saucy", but you don't want it thin and runny.) Toss sauce and pasta together in a large bowl. Sprinkle with parsley, and serve immediately.