Grate the potatoes and onion using a box grater or food processor. Place the mixture in a clean kitchen towel and squeeze out as much liquid as possible.

Transfer to a large bowl. Add eggs, flour, salt, and pepper. Mix well until fully combined.

Heat about 1/4 inch of oil in a skillet over medium heat. Drop spoonfuls of the potato mixture into the pan and flatten into pancakes.

Fry for 3–4 minutes per side, or until golden brown and crispy. Drain on paper towels.

Serve hot with sour cream or applesauce.