Here is a list of ingredients from the McDonald's website: Potatoes, vegetable oil (canola oil, hydrogenated soybean oil, natural beef flavor [wheat and milk derivatives]*, citric acid [preservative]), dextrose, sodium acid pyrophosphate (maintain color), salt. Prepared in vegetable oil (Canola oil, corn oil, soybean oil, hydrogenated soybean oil with TBHQ and citric acid added to preserve freshness). Dimethylpolysiloxane added as an antifoaming agent.
Peel the potatoes. In a large mixing bowl, combine sugar, corn syrup, and hot water. Make sure the sugar is dissolved. Cut the peeled potatoes into shoestrings 1/4" x 1/4" in thickness, and about 4" to 6" long. Refrigerate. Let them soak about 30 minutes. Drain the potatoes and dump them into the fryer. After 1 to 1½ minutes, remove the potatoes and place them on a paper towel lined plate. Let them cool 8 to 10 minutes in the refrigerator. After the deep fryer is reheated to 375°-400°, add the potatoes and deep fry again. This time for 5-7 minutes until golden brown. Remove and place in a large bowl. Sprinkle generously with salt, then "toss" the fries to mix the salt evenly. ( I suggest about 1 teaspoon of salt, maybe slightly more)