Cook Potatoes: Boil potatoes in salted water until soft, about 30 minutes. Drain and dry for 1 minute on low heat.
1.5 lbs potatoes, Salt
Mash: While hot, mash the potatoes using a grater, masher, or fork.
Spread: Transfer mashed potatoes to a bowl or plate and spread evenly.
Portion: Divide into four parts, set aside one quarter.
Add Flour: Fill the empty space in the bowl with potato flour for a 4:1 potato-to-flour ratio. Adding slightly more is okay.
Mix Dough: Combine potatoes, potato flour, set-aside potatoes, egg(s), and mix to form a dough.
5 oz potato flour or potato starch, 1 egg
Boil Water: Bring a large pot of salted water to a boil.
Salt
Shape Dough: On a floured surface, roll dough into a cylinder using well-floured hands and cut into one-inch pieces.
Form Dumplings: Flatten dough pieces between hands, then press a hole in the center of each using your index finger. Transfer to a floured surface.
Cook Dumplings: Add dumplings to boiling water in batches. Cook until they float, then simmer for 3 more minutes.
Remove: Use a slotted spoon to transfer dumplings to a plate.
Serve.