Kettle Chips

Ingredients

• 1 Russet Potato
• 1 to 2 inches Peanut Oil
• Salt or seasoning

Method

Kettle chips demand two distinct temperature phases: a low initial cook to soften and dry the potato, then a sharp heat spike to crisp the exterior and develop colour. Set your pot or wok on the hob and pour in enough peanut oil to reach 4–5 cm up the sides. Bring it to 157°C using a thermometer — this is non-negotiable, as guessing will leave you with either greasy chips or burnt ones. While the oil comes up to temperature, wash the potato and slice it on a mandoline set to 2 mm, or use a very sharp knife to get uniform thickness. Uneven slices cook at different rates; thin spots will burn whilst thick ones stay soft.

Once the oil holds steady at 157°C, add the potato slices in batches — do not overcrowd the pot, as this will drop the temperature and cause deep-frying|deep-frying to stall. The oil will dip to around 120°C in the first few minutes as the moisture in the potato cools it. Stir frequently but not frantically; you want the slices to move freely and colour evenly. What you're doing here is driving off water whilst the potato-cooking|potato starch gelatinises. After 4–5 minutes, the oil will recover and climb back towards 157°C. This is when the chips will stop bubbling so aggressively and the surface will shift from pale to golden. At 9–11 minutes total, the chips should be golden-brown throughout with no audible sizzle — the absence of sound means the water content has dropped near zero. The surface should feel waxy and crisp when you break one; any hint of give means they need another minute.

Pull the chips from the oil with a slotted spoon and spread them on a wire rack lined with kitchen paper — do not pile them on flat paper or they will steam and soften. Salt them immediately whilst hot; the salt will adhere better and flavour the chip more evenly. Once cool, store them in an airtight container. Strain your oil through a fine sieve lined with kitchen paper back into a clean bottle — peanut oil can be reused 3–4 times before degradation becomes noticeable in flavour and smoke point.