A mechanical cutting device cuts twisted strips of foods such as potatoes. The device comprises twisted cutting tubes, each having a ring secured at a distance from the cutting end. A plurality of such tubes may be arranged in an array, which may be supported by plates having an array of tube-supporting orifices. The cutting tubes are supported for rotation in such manner that, when force is exerted on the tubes to insert the tubes into the food, the tubes rotate as they cut into the food obtaining as result twisted strips of food.