My friend forgot to buy cream cheese so she substituted with Greek yogurt and we doubled the recipe. I bet the cream cheese would make it even richer. Next time, I'll add a bit of lemon zest but yowza. I can't wait to make this again! This one has a permanent spot in my recipe collection.http://eat.at/swap/forum/index.php?action=display&forumid=1&msgid=13320