SHOPPING LIST: Cooking Skills: Potatoes 1, Chapter 4 (Chips, Wedges and Fries) Floury potatoes for the chips and wedges. Sweet potatoes for the fries. Oil for the double-cooked chips: choose a neutral oil with a high smoke point, such as sunflower. A frying thermometer is useful but not needed (a bread cube works). Oven wedges (2 portions) [ ] 2 medium floury or all-rounder potatoes (about 400 g), scrubbed, skin on [ ] 1 tbsp sunflower or olive oil [ ] 1 tsp smoked paprika [ ] 1 pinch salt Oven chips (2 portions) [ ] 400 g floury potatoes (Maris Piper), peeled [ ] 1½ tbsp sunflower oil [ ] 1 pinch salt Double-cooked chips (2 to 3 portions) [ ] 500 g floury potatoes (Maris Piper), peeled and cut into 1.5 cm chips [ ] 1 tsp salt, for the water [ ] 500 ml sunflower or vegetable oil, for shallow frying (2 cm deep) [ ] 1 pinch salt, to finish Sweet potato fries (2 portions) [ ] 300 g sweet potatoes, peeled and cut into 1 cm sticks [ ] 1 tbsp sunflower or olive oil [ ] 1 tsp cornflour [ ] ½ tsp paprika or cumin [ ] 1 pinch salt For the experiments [ ] About 1.5 kg more floury potatoes [ ] An air fryer if you have one [ ] A heavy, deep pan and a lid