I added only butter, non-fat sour cream and a little heavy cream to the potatoes. Very company worthy. I made the meat mixture in the morning and the potatoes but kept them separate until right before putting in the oven. I used baby bella shrooms and white button because the store did not have enough good white ones that were tightly closed.http://eat.at/swap/forum/index.php?action=display&forumid=1&msgid=170280