I hope this doesn't seem like a silly question. All of my recipes are from scratch. I have halved them before, but never doubled them. Is it as simple as using 2 times the ingredients, or do I have to make modifications to my recipe? What about doing 1.5 batches... same question... just add 1/2 the amount more?
So far, I have had no problem doubling or 1.5'ing any of the scratch recipes I use. Larger batches than that may require alterations, but I don't feel comfortable putting that much in my mixer at once, so I've never tried more than double.
I usually double it as is. According to the Cake Bible, you should probably readjust the baking powder as you make a larger cake. I haven't done this in the past, but am curious to try it out.
Here's a thread that may help you
I've also doubled my recipes with not problem.
I, like others, have done straightforward 1.5x and 2x my recipes. I did not find any noticable changes in taste or consistency.
Thanks everybody! I'm going to try doubling for this weekend.