Start by boiling a large pot of salted water. Once boiling, add the fettuccine. Cook until al dente, which should feel slightly firm to the bite. This should take approximately 10 minutes. Avoid overcooking to prevent mushy pasta.
In a separate saucepan, melt the butter over low heat until it is bubbly and fragrant. Pour in the light cream, stirring gently until combined. Warm the mixture without boiling, aiming for a smooth consistency.
Gradually stir in the freshly grated Parmesan cheese while letting it melt into the cream sauce. This should create a velvety mixture. Adding the cheese slowly helps prevent clumps.
Sprinkle in the Old Bay seasoning into your sauce, stirring for even distribution. You should start to smell the spices coming together, taking care not to overpower the dish with too much seasoning.
Add the cooked fettuccine directly into the creamy sauce and mix gently until every strand is coated evenly. The dish should look luscious. Avoid stirring too vigorously to keep the pasta intact.
Gently fold in the crab meat, being cautious not to break it apart too much. The sweetness of the crab enhances the richness of the sauce. Avoid over-mixing to maintain texture.
Just before serving, top your Crab Alfredo with the chopped fresh parsley. This adds color and aroma, enhancing the overall presentation.