Muffins

The students in my class run a very successful muffin business selling muffins to the staff at each building in the district once a month. We have found that the more "sinful" the muffin the better our sales tend to be. The issue we have is that one of our favorite people is a earnest health proponent and feels very strongly that we should be serving healthy muffins. I can see what she is saying, but would you really be ordering a orange bran muffin or a multi-grain apple muffin? I think one treat a month may not be a bad thing, but we are trying to give our customers what they want. So, what do you want?