I wonder if another issue could be the coconut flour. I buy it in bulk, and there's no nutrition information with it at the store. So I went hunting around on the 'net. I was disappointed to find three completely different sets of nutrition facts. It could be some kind of labeling or calculation error, but it could also be that different brands are vastly different products. One seemed to be relatively high in fiber, low in calories. Another seemed to be much fattier, and higher in calories. I would imagine this would give the different coconut flours different baking properties.