I'm using this recipe, and i need to make 2 12" square cakes, i asked kakeladi, the orignial creater of this recipe on how many batches i should make, but i'm not quite understand what she means...
"A 12" sq requires 2 regular cake mixes - therefore you will need to make1 recipe and add 1/2 extra cake mix (along w/1/2 of a pkg of mix and 1/2 cup water and 1 egg.)"

she says to make 1 recipe and add 1/2 extra cake mix, along with 1/2 package of mix..what does she mean by cake mix and package of mix? can anyone please explain a little better as she's already off the internet for today.

Thank you!
Sara

I find that the average cake mix yields about 5 cups of batter. (That's a ball park figure) When I bake, I always look at my charts and measure out my batter.
http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm

According to this Wilton Baking/Serving Chart, you will need 10 cups of batter for each 12" square you bake.
Because Kakeladi's recipe adds an additional 1 cup sugar, 1 cup of sour cream and 1 cup of flour, I think it would be safe to say you are adding 3 additional cups of volume, to the boxed mix which yields 5 cups of batter making a grand total of 7-8 cups of batter.

When I am baking, I try to get the amount of cake batter as close to what I need as possible. I would mix up the cake mix and measure exactly 10 cups of batter per 12" square. If you skimp on the batter for what ever reason, you layers will be short, making your cake short. A taller cake is more appealing to the eye.

If I have left over batter, I usually throw it into cupcake tins. I have heard of people freezing the raw batter, then bringing it to room temperature and baking it with no problems.
I just bake the cupcakes and freeze them for a little extra. Sometimes I take cupcakes home, sometimes I take them to the classroom i work in and feed the kids cupcake for snack, and sometimes I just give a half a dozen cupcakes away to make someone smile. (I don't need the calories)

I hope this helps,

tokazodo

To be a little clearer: I would just bake 2 cake mixes plus the additions. I would measure out the 10 cups of batter into the 12 inch square. If there was only one cup of batter left in the bowl after measuring it out, I would just pour it all into the square. If there is more then one cup left over, I would make the cupcakes.

Again,
I hope this helps,

tokazodo