Potato flakes and nonfat dried milk may seem like unusual ingredients for rolls, but they actually serve an important purpose in the baking process. Potatoes have a lot of starch, which is able to absorb and retain a lot of moisture. Adding potato flakes to the bread dough results in soft, fluffy rolls with an extended shelf-life. Additionally, dried milk — which is milk in its most concentrated form — adds protein, fat, and flavor to baked goods without impacting the liquid-to-dry ratios. This translates to bread and rolls that are especially tender and flavorful.