Welcome to DC. I am sure someone will come along with a great recipe for a thick Alfredo Sauce. A true Alfredo consists of butter, grated Parm cheese and some cream. How much of each depends on how much you want to make and how many are you feeding. I find that if there are leftovers, then you try to heat it up the next day, it breaks down. Maybe I am reheating it wrong. But I try to make just enough for one meal at a time.