The have a very soft consistency (due to the lack of flour), so they don't keep well at room temperature. (pumpkinandpeanutbutter.com)
I like to call these cake muffins since they don't really taste so much like a muffin, but have the light and soft consistency of a cake. (betterbakingbible.com)
* I add a little coconut oil to the chocolate in this recipe because it makes the chocolate set at a slightly softer consistency. (nourisheveryday.com)