For fries, cut potatoes and hold in cold water until all potatoes are cut. Blanch in boiling water for 2 minutes; plunge into cold water; drain and dry well with paper towels. Fry in hot oil (375°) until very light brown. Drain on paper towels until cool. Pack into freezer containers or bags. Later, fry frozen potatoes in deep fat preheated to 375° until crisp and golden brown.