Wash the 2 medium russet potatoes, peel them, and cut into French fries using a mandolin slicer with the French fry blade.
Toss the potato fries with 1 teaspoon of salt and set aside for 10 minutes.
Drain the saltwater from the fries and lightly pat them dry.
In a small bowl, mix 2 tablespoons of cornstarch, 1/2 teaspoon of mint powder, 1/4 teaspoon of black pepper, 1/4 teaspoon of ground red pepper, and 1/8 teaspoon of citric acid together.
Sprinkle the spice mix over the potatoes and mix well, ensuring all the fries are covered with spices.
Heat 1 ½ inch of oil in a frying pan on medium-high heat.
Test the readiness of the heated oil by placing a potato strip in the frying pan. The oil is ready when the potato strip sizzles.
Fry the fries until they become golden in color all around, turning them a few times while frying.
Using a slotted utensil, transfer the fries from the oil and drain on paper towels.