About a year ago, I read about how to use potato starch to give moisture to cakes and ended up trying it to make a vanilla bean cake for my daughter's birthday. (livesimply.me)
I made a black bean cake years ago in my old home for my dad and sister. (atasteofmadness.com)
Place bean cakes in the oven and roast for 10 minutes, or until the cakes start to lightly brown. (ciaprochef.com)