These quinoa apple spice muffins taste great and are extra nutritious thanks to the addition of high protein quinoa flour. Quinoa is an andean grain that has an unusually complete array of amino acids, including lysine. Andean civilizations have subsisted on quinoa for generations, and its nutritional attributes have brought it to the attention of the global market. You can buy quinoa in flour form (as well as in oatmeal-like flakes, and in it's natural form). Quinoa flour is gluten-free however, so some regular wheat flour is included in the recipe to ensure that the muffins rise well.