Ingredients: potatoes and ketchup. Specific method: 1, clean the skin of the potato, cut the potato into thick slices first, and then cut into potato chips. After cutting, put it in clean water to wash off the starch on the surface to prevent the potato from oxidation and blackening. 2. Boil the water in the pot, put two spoonfuls of salt into the bottom flavor. After the water is boiled, put the potato chips in the pot and cook for about 30 seconds. When the discolored surface of the potato is slightly translucent, pour it out and quickly soak it in cold water. 3. Then pour the potato chips on absorbent paper and dry them for later use. To make the water dry faster, blow it with a fan. 4. After the water is completely dry, put the potato chips in a fresh-keeping bag, put them in the refrigerator for more than 3 hours, and freeze the potatoes hard, so that the fried potato chips will not become soft and the outer layer will be brittle. After 5 or 3 hours, take out the potato chips, pour them into a small basin and break them up by hand. 6. Start frying potato chips and burn oil in the pan. When the oil temperature is 50% hot, the oil level smokes slightly. First, pour in half of the potato chips, because there is less oil, so you can't fry them all at once. Gently push until heated evenly, and continue to fry on low heat for about 2 minutes. The potato chips are taken out after discoloration and solidification, and the remaining potatoes are fried in the pot. 7. After all the potato chips are fried, raise the oil temperature to 60% heat, turn to low heat, and put the potato chips that have just been served back into the pot for frying again. When the potatoes are golden yellow and very crisp, they can be taken out of the pot and dipped in ketchup. Precautions 1. Potatoes must be dried and frozen in the refrigerator, otherwise they will stick together; After freezing and frying, the French fries will not be soft, and the outer layer is crisp. 2. French fries must be fried twice, and the taste will be crisp outside and soft inside.