Homemade Fettuccine Alfredo Ingredients Box of fettuccine 9 tbsp butter 1 ½ cups heavy cream 1 ½ cups Parmesan cheese ½ tsp salt Instructions Follow box’s instructions and cook the fettuccine. Once it’s cooked, drain and take off heat. Keep it in the pot you cooked it in. Melt the butter, add heavy cream, and