Good Eats Potato Starch is used to thicken sauces, gravies, soups, puddings, and pie fillings • Naturally gluten-free and flavorless, potato starch is also ideal for adding moistness and a fluffy texture to baked goods • Potato starch tolerates higher temperatures than cornstarch, making it an excellent thickener for soups and stews • It adds moistness to any baked goods and is an essential ingredient in gluten free baking