Marvelous Oat Bran Muffin Mix - Lindley Mills. Made with 100% organic Lindley Mills flour, this complete mix makes it easy to create your own muffins and try something new! A healthy treat to whip up for friends and family. Just add water, milk, or your favorite juice and you have the ingredients for simply marvelous muffins. Try adding chocolate chips, raisins, blueberries, strawberries or your favorite fruits!