Unlike potato flour (which because of its strong potato flavor and heavier weight should never be substituted for potato starch in baked goods), potato starch flour / potato starch has a neutral taste, and is an excellent choice for thickening sauces, gravies, stews, and soups. It also produces superior flour-free sponge cakes, for it absorbs and retains moisture to a far greater degree than wheat flour and produces cakes with a lighter texture.