I'm having a really hard time getting a grasp on serving sizes. I understand party cakes vs wedding cakes, and Wilton is different than Earlene's, etc., but I can't seem to come up with a solid answer when someone asks "so what size cake do I need for this many people".
Here's my specific issue...I'm making a wishing well cake for 15-20 people, with a filling. Do I make two 8 inch rounds and slice those horizontally (I think the term is torte?), essentially having 4 stacked thin layers? Is that enough to serve 15-20 party cake slices? Do I go bigger?
Thanks for any help!