I'm from Australia and I'm not sure what white cake box mix is so I was hoping to get my hands on a substitute scratch recipe is possible?
I was actually looking at the white almond sour cream recipes and I must try it! ( I only just worked out what WASC stood for!)

Here's a thread with links which has scratch white sour cream recipes, as well as size info on popular American cake mixes:

http://cakecentral.com/cake-decorating-ftopicp-2881563.html#2881563

And a thread on A Better White Scratch Cake (to be used as scratch WASC):

http://cakecentral.com/cake-decorating-ftopict-654467-.html

HTH

Thanks heaps! I got myself a standard pack of "Vanilla cake mix" from the supermarket.

p.s. what is HTH?

HTH = hope this helps