I charge per cake servings. Period. If I can't make a cake that fits her exact guest list, then it's up to her to choose whether she wants more servings than people invited or less.
It's also up to her whether or not she's going to serve the top tier. I've only had 1 bride want to save it. I don't offer it as a gift. It's cake that I am making for them and they'll have to pay for it.
Now if they come back a year later and want an anniversary cake I will often do it either for free or very discounted...but I don't tell them that, it's just a nice surprise. The discount depends on the pita factor.
.gif)