Ditto for masa harina. Here's how to make your own. Photo by Hank Shaw. Start with corn. Duh. And if you are going to do this, you want legit, heirloom flour, dent, or flint corn if that's all you can find. I recommend buying from Masienda, Heirlooms and More, or, for red bloody butcher corn (the red corn in the picture), Breadtopia.Web