Are potato starch and potato flour the same product?

No. Potato starch and potato flour are not the same and cannot be interchanged in recipes. Potato starch is made from just the starch of the potato and has a neutral flavor. It is primarily used in gluten free baking and can also be used as a thickener. Potato flour is made from the whole potato and has a distinct potato flavor. It can be used as a thickener. Recipes which call for potato starch flour are referring to potato starch.