I'm making tres leches cake for cinco de mayo. It's the taekwondo acadamy that my kids go to. Right now there are a little more than 50 people signed up to come (it's a potluck), with more than half being kids. I'm planning on making at least a 12x18. I'm wondering if I should make another 9x13 or even more. The cake itself is not very high, barely 2 inches and I'm serving it in the pan. If I go with 2x2 servings a 12x18 will give me 54, but people will be serving themselves. Did I mention margaritas and shots of Petron are being served? I'm thinking people may help themselves to generous servings.
I made a practice cake and sent to work with dh and everyone loved it, so once a few people taste it I think everyone will want some. Oh, and I'm the only one signed up to bring any kind of dessert.
I guess what I'm asking is besides the one 12x18 should I make another 9x13 or another 12x18? I have read a bunch of posts on serving sizes, but since this is more of a party party I think people may eat more than normal sized servings. What would you do?
I don't know... 12x18 seems like plenty for ~50 people who will be eating prior to dessert. A lot of adults in my area don't "do" dessert (and will obnoxiously announce it to anyone who will listen). Not sure if that's a new trend nationwide, or limited to the self-absorbed nouveau-riche wannabe crowd. These are the same people who go to the health club and work out to stay fit, but will then illegally park in a handicap parking spot at the grocery store so they won't be inconvenienced with having to walk an extra 50 feet. 
Well, anyway, maybe this'll bump your question and someone else can give you a better answer. 
LOL - sooooo not the case in my area. I'll see if anyone else signed up tonight and probably make an extra 9 x 13.
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