These classic potato pancakes are bound with egg and their own starch - no flour or other binders necessary! They also freeze beautifully, so make the whole batch even if you're only feeding a few people.
Using a box grater or a food processor fitted with a grater attachment, grate the potatoes on the large holes. Working in batches, pile the potato shreds onto a piece of cheesecloth or clean kitchen towel. Loosely tie the corners of the cloth around a wooden spoon and then twist the spoon until water squeezes out - collect the water in a measuring jug or bowl.
Add the squeezed potato shreds to a large mixing bowl. Let the potato water settle for about 10-15 minutes to allow the starch to collect at the bottom. You will notice a thick white layer at the bottom of the jug. Once the starch has collected, pour off the water, leaving the starch in the jug.
Meanwhile, add a tablespoon of oil to a large skillet (preferably cast iron) and set over medium heat. Once shimmering, add the onions along with a generous pinch of salt. Cook, stirring occasionally, until they're softened and beginning to brown - about 10-15 minutes.
Measure out 3 tbsp of collected potato starch - if there is not enough, supplement with the additional potato starch - and add it to the bowl with the shredded potatoes. Add the cooked onions, eggs and salt and stir until thoroughly combined.
Add 60ml (¼ cup) of oil to a large skillet (preferably cast iron) and set over medium heat. Once shimmering, compact a small handful (about 30g/¼ cup) of the potato mixture and add it to the skillet, being careful not to crowd the pan. Cook each pancake for 5 minutes - or until golden and crisp - flip and cook on the other side for an additional 5 minutes.
Continue cooking the pancakes until they're all crisp and golden (see note 3), adding more oil as necessary. Serve hot or at room temperature, with a side of sour cream or applesauce.
Notes
Use potatoes with a high starch content (ie "floury" potatoes) for the best results. In the US, russet/Idaho potatoes are a good option. In Australia, this recipe was developed using brushed potatoes.
You may not need potato starch if you can get 3 tbsp of starch from your potatoes. If you don't have potato starch, you can substitute and equal amount of cornstarch (cornflour).
The cooked and cooled latkes can be stored in an airtight container in the refrigerator for 2 days. Reheat on a baking tray in a 190°C/375°F oven for 3 minutes per side, or until crisp and warmed through.
The cooked and cooled pancakes can also be frozen solid on a baking tray. Once frozen, transfer to a freezer bag or airtight container and freeze for up to 6 months. To reheat, add the frozen latkes to a baking tray and toast in a 190°C/375°F oven until crisp and warmed through - about 6 minutes per side.