01 -
Bring a large pot of salted water to a boil. Add fettuccine and cook until al dente according to package directions. Drain the pasta and set aside.
02 -
In a large skillet over medium heat, melt the butter. Sprinkle in the flour and whisk constantly for 30 to 60 seconds to form a smooth roux.
03 -
Slowly whisk in whole milk to the roux, stirring continuously to prevent lumps. Add cream cheese and continue whisking until the mixture is smooth and creamy.
04 -
Stir in grated Parmesan cheese, chopped parsley, garlic powder, onion powder, salt, and white or black pepper. Cook, stirring frequently, until the sauce thickens and becomes creamy.
05 -
Gently fold in the lump crabmeat and let it heat through without excessive stirring to maintain the integrity of the crab.
06 -
Toss the cooked fettuccine with the crab Alfredo sauce or spoon the sauce over individual pasta portions. Garnish with additional parsley and serve immediately while warm.