As explained, this is not your grandma's old-fashioned banana bread. Garbanzo flour does have a stronger flavor than most are not used to, and its texture is not the same as regular flour. Reasons for the way yours turned out could be the age of the products purchased, over baking, or some other causes. As mentioned, I heaped up the seasonings because this flour can take the extra flavors. Garbanzo flour isn't for everyone, but exploring using it offers a chance to incorporate a healthy flour into our menus.