01 - 
                Boil the fettuccine in salted water according to package directions until al dente. Drain and set aside.
              
              
              
                02 - 
                In a large skillet over medium heat, melt the butter. Whisk in the flour and cook for 30–60 seconds, stirring constantly.
              
              
              
                03 - 
                Slowly add the milk a little at a time, whisking thoroughly between each addition. Add the cream cheese in small chunks, stirring until it melts into the sauce.
              
              
              
                04 - 
                Add Parmesan, parsley, garlic powder, onion powder, salt, and pepper. Stir until the sauce is smooth and well blended.
              
              
              
                05 - 
                Gently stir in the lump crabmeat and simmer on low heat until the crab is warmed through.
              
              
              
                06 - 
                Toss the cooked fettuccine with the Alfredo sauce, or serve the pasta topped with generous spoonfuls of the sauce.