Chick, I think Dotsie and Bluebird have made these...maybe they've done double batches and have some feedback to offer too.

This is supposed to be a really easy recipe to double. My SIL who gave me this recipe does double-batching all the time and hers usually turn out perfect. But I've had varying degrees of success when doubling. Some have turned out dry, thick and crumbly, other batches have turned out fudgy and even more irresistable than normal. I don't know what the difference is! It could be that I don't have a proper-sized pan for the doubled batch...so I'm not sure what size pan to suggest...probably the best would be two 8-inch pans (I only have one, which is probably why I run into problems with the double batch!)

I can usually get about 12 small squares out of a single batch...my experience is that one batch is rarely ever enough.