This isn't so much a recipe as a technique. Making chips at home might seem like a lot of effort but I promise this method yields excellent chips with a deep crisp exterior and creamy interior. The type of potato you choose is crucial to success. It must be starchy but also golden. A very white potato like a russet will dry out before it's golden. Note that the potatoes need to cook for about an hour, so you'll want to start well before you're ready to serve.
1kg large chipping potatoes (such as sebago, coliban or pontiac)
about 1 litre oil for frying
1. Cut the potatoes into medium-large chips and place them into a large bowl of water. When you're ready to start cooking, drain and dry the chips with a clean tea towel or paper towel.
2. Put the chips in a large cast iron or other heavy-bottomed pot. They should only half-fill the pot. If they go any higher you must find a larger pot for safety reasons.
3. Pour in enough cold fry oil over the chips to cover them by 5cm to 6cm. Place the pot on the stovetop and turn the heat to the higher end of medium-high. For about the first 20 minutes stir the every few minutes. But once the potatoes start to soften you'll need to mix them more gently to avoid breaking them. Allow the oil to bubble more rapidly and once the chips have softened considerably, turn the heat to high. This will crisp up the chips and turn them golden.
4. When their exterior has hardened and they begin to float, you can mix them more frequently. If any have stuck to the bottom, carefully scrape the bottom of the pot with a metal spoon to release them. When the chips are deeply golden (total cook time is about an hour) lift them from the oil using a spider (a long-handled wire-mesh skimmer) and toss them in a bowl with lots of fine salt.