Peel sweet potatoes and rinse them under cold water.
3 medium sweet potatoes
Slice the sweet potatoes with a mandoline on the thinnest setting. If you don't have a mandoline, use a sharp knife and cut as thin as possible.
Heat a deep fryer pan to 350 degrees Fahrenheit.
3 - 4 cups oil for frying
Put several slices in the fryer and turn each individual slice over with a fork after 30-45 seconds. Work in small batches, making sure to avoid overcrowding the hot oil.
Let the chips cook for another 30-45 seconds (1-1 ½ minutes total) and transfer to a large bowl lined with a kitchen cloth or paper towel to soak up excess oil.
Sprinkle seasonings on the chips while they're still warm.