Hi everyone I'm new here. I'm fairly new to the whole cake thing but have baked before. I want to make my sons first birthday cake and I bought a 16 x 2 round (going to make layers). I am using the cake boss recipe Nd I've been trying to figure out like how much flour and all of the other ingredients I need to fill just one16x2 round. I read I need about 15 cups of batter is that correct? I don't know if I'm missing something but how do I know how much flour etc I need to use to get that 15 cups or whatever it may be. I see a lot of people using cake box mixes but I really want to use thus recipe thanks! Here's the recipe I'm using  .http://www.rachaelrayshow.com/recipe/14376_The_Cake_Boss_Vanilla_Cake/

How many people are you feeding? That's a massive cake - and it will take a lot of experience to bake it evenly through!

To scale cakes, I just take the ratio of tge area of the pan I wish to fill compared with the area of the pan the original recipe fills and multiply the base recipe by this ratio. I know other people work in cups for each pan - but it's the same basic principle.

Probably 100, I'm sure there will be left overs but it's okay. The reason I want to make it so big on the bottom is bc the second tour us going to be a Mickey Mouse head with a baseball diamond on top, so I wanna have enough space for the decorations, and bc it's my baby's 1st birthday and I am super excited!!! 😊😊😊

the area of 2 8" round pans is  100.5 inches sq.  The area of 2 9" rounds is 127 inches sq.       The are of one round 16" pan is 201 inches sq.  so If you have a recipe that makes 2 8" or 9" cakes, double it for one 16" round.   HTH

Ok great thanks! I wasn't sure if that would work or not! 

What's should I be doing differently with baking it so it bakes evenly? Turning it every so often? Although I know you're not really supposed to open the oven much BC it affects the baking time. 

I would use multiple heating cores, bake even strips, lower the oven temperature and bake it for a longer time.

http://www.wilton.com/cakes/making-cakes/baking-serving-guide.cfm