Sheet size servings...Ive read, read & read trying to get it with what seems to be so much conflict on serving sizes and I still end up wanting to cry. 
I need a sheet cake to serve 30. The best I can figure is using 2 9x13s stacked. That is probably too much, but a single 9x13 is not enough.
Does this seem right to yall? I feel SO frusterated.
Thanks in advance,
Shelly
Hey! I could be wrong but this is what I have always heard. A single layer 1/2 sheet which is a 11 X 15 should feed about 30-40 people. I also googled it and came up with the same informaion. Hope this helps and maybe someone with more knowledge will post their answer.
Good Luck
Sherri
11x15 should serve 30-40 depending how big you cut the pieces.
The standard serving size for a single-layer sheet cake is 2x2 inches. This means:
9x13 = 24 servings
11x15 = 35 servings
12x18 = 54 servings
If you decide to make double-layers (4" tall) then of course you would double the serving sizes, so a double-layer 9x13 = 48 servings.
I would use an 11x15 for the servings you need. Good luck! 
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