This is the authentic Alfredo sauce recipe, "fresh grated Pecorino Romano cheese, and lots of it. Melted over hot pasta, add pasta water and a few tabs of butter to give it the saucy consistency, and fresh cracked black pepper, that's it, no cream needed".
I know this is an older thread, but I felt the need to add the 100% real deal Alfredo sauce recipe for future readers? searches. I can't stand ordering Alfredo sauce in a restaurant, and it comes out a cream sauce, real Alfredo has zero cream added to it, it gets its creaminess from the melted cheese, butter and pasta water.
Done right, it's an amazing sauce!!!
Dan.