I searched to look for my answer but couldn't find anything exactly so I thought I would just ask! I need to make a 12x18 sheet cake. Is it ok to double a recipe and mix it all together? I have a mixer that can hold 14 cups so it can handle it, but it won't effect the cake itself will it? Its a pumpkin cake, if that makes a difference. I plan on using the flower nail method for even baking at 325 and have no idea how long to bake it for either. This is obviously my first sheet cake! Any suggestions would be more than appreciated!! Thanks!

I double my recipes all the time without making any adjustments. I'm not sure about trippling though, I whould think by then you would need to add more levening...but I'm not sure.

I grew up being told, "Not all recipes double well."
I would make 2 or 3 separate batches and then stir the batches together to make one big batch.