1, buy some potatoes with big dots and smooth, wash them first, peel them clean, cut them into required strips or slices or blocks, soak them in water with salt for about half an hour, take them out and drain them, then blanch them in a boiling water pot 1 to 3 minutes, then take them out and drain them and put them in a plastic bag and put them in the freezer for about 2 hours, until the potatoes are completely frozen.

2. Pour the oil into the oil pan on fire, heat the oil to 130 degrees, that is, about 40% heat. When the potatoes are fried to slightly discolor, they can be fished out. Then, when the oil temperature is heated to 180 degrees, that is, 60% heat, the potatoes can be fished out again, and fried to golden brown.

In this way, after salt soaking, freezing and hot frying twice, the potato is crispy.