“This easy Alfredo sauce is creamy, comforting and coats fettuccine noodles in fine fashion. This recipe is wonderful as is, but sometimes I like to add sliced fresh mushrooms and black olives that have been sautéed in butter and garlic.” —Jo Gray, Park City, Montana
Cook fettuccine according to package directions. Meanwhile, in a saucepan, melt butter over medium-low heat. Stir in the cream, 1/4 cup cheese, Romano cheese, egg yolk, salt, pepper and nutmeg. Cook and stir over medium-low heat until a thermometer reads 160° (do not boil). Drain fettuccine; combine with Alfredo sauce and remaining Parmesan cheese. If desired, sprinkle with parsley.