Prepare pasta according to package directions. Drain and set aside.
In a large skillet, heat olive oil and butter on Medium High. Add the mushrooms and green onions. Saute 5-7 minutes, until softened and fragrant.
Add the garlic and continue cooking another 1-2 minutes.
Add white wine and cook an additional 1-2 minutes.
Sprinkle mushroom mixture with flour and toss to coat.
Slowly pour in the creamer, stirring the mixture gently. Reduce heat to Low and allow to simmer until thickened slightly.
Remove from heat. Stir in the Parmesan cheese and sprinkle with parsley. Season to taste and serve hot.