Heat butter with shallots in a sauté pan until shallots start to sizzle.
Add sliced mushrooms and cook about 2 minutes. Season with salt and pepper.
Add white wine. Cook about 30 seconds, then add cream; when cream starts to bubble, whisk in the cheese until melted. Remove from heat.
Boil pasta in salted water approximately 3 minutes (longer for dried pasta). Drain well and toss with mushroom sauce. Drizzle white truffle oil over the top and serve.