I finally made this. It's pretty good. I didn't follow the instructions; I just put it all in the blender and the resulting cake is a bit heavy. There's no beaniness, though. I would describe the texture as being like stale cake, but without the stale taste. The sugar alcohol is slightly cloying, but that's just the nature of it. Maybe the amount of sugar alcohol could be cut down by using something different inside the cake and just using the erythritol in the frosting.