Wash the sweet potatoes thoroughly and slice them thinly.
Soak the sliced sweet potatoes in cold water to remove starch.
Drain the sweet potatoes using a strainer to remove excess water.
Add cooking oil to a pan and preheat over medium heat.
Put the sweet potatoes in the pan and fry them until golden brown on both sides.
Drain the oil and place the chips on a cooling rack to cool.
Sprinkle a little salt to taste, if desired.