Peel potatoes; cut in even ⅛″ slices. Soak 4 minutes in ice water; pat dry on paper toweling.
Heat shortening in deep kettle to 300°. Cook a few slices at a time at this temperature until light brown and half-done, about 10 minutes. Remove from kettle; drain on paper toweling.
After frying all potatoes at 300°, heat shortening to 400°. Add more shorteni