To put it simply, potato flour is made only from cooked, dried, and ground potatoes. However, despite the fact that potato flour resembles finely powdered potato flakes, the two goods are fundamentally dissimilar. True potato flour should only be used sparingly to stretch other flours because it makes a stickier product when liquid is added. Potato flour that is in the form of granules will pass through a 40 mesh (420 microns) screen, whereas fine flour will pass through an 80 mesh 177 microns screen.