Bring large pot of lightly salted water to boil. Add pasta, and cook until al dente, about 8-10 minutes. Drain & set aside

Heat 1/2 cup butter in large wok or skillet over medium heat, & cook until soft. Remove and set aside.

Heat 1/2 cup butter in large wok or skillet over medium heat, & stir in onions and garlic & cook until soft & translucent

Add cream cheese & cook until melted

Reduce heat to medium low, & stir in flour, whip cream, & 1/4 cup parmesan cheese

Stir in shrimp, cajun season, salt & pepper to taste. Cook until shrimp are pink and sauce thickens, about 3 minutes.

Add mushrooms and green onions

Stir in fettucini noodles into sauce

Add parmesan cheese as desired. Serve hot and enjoy!