Ingredients 

Baked potatoes: 2
Sea salt: appropriate amount
Black pepper: moderate amount
Edible oil: a little
salt: a little
White vinegar: two tablespoons

 Step 

① Wash and peel the baked potatoes, cut into thick slices, and then cut into strips, each about half an inch thick.

② Rinse the french fries with clean water until there is no cloudiness (to wash away the starch on the surface), then put in a pot of clean water and soak in salt and white vinegar for 15 minutes.

③ Put cold water in the pot, put in the fries, and turn on the fire.

④ Fry the fries for about 2 minutes, heat slightly (not to be cooked), and pick up when the surface is slightly translucent.

⑤ Put it in a ventilated place to air dry, use a paper towel to dry it and blow it with a fan for one hour, and let it dry naturally for about two hours.

⑥  After drying, put the fries in a large plastic bag or a large plate, add appropriate amount of cooking oil, sea salt and black pepper and mix well.

⑦ Put it in a fresh-keeping bag and shake well for the most convenient and uniform.

⑧ Preheat the air fryer at 200℃ for a few minutes, put in the fries and air fry for a total of 20 to 25 minutes. Remove every 5 minutes and turn the fries over to heat them more evenly.

⑨ In the last 5 minutes, depending on the power of the air fryer, you can adjust the temperature to 180°C. The fries will dry out. Serve hot on a plate.