- 2 lb (900 g) russet potatoes, about 3 large - 4 cups (960 ml) ice water (for soaking) - 4 cups (960 ml) neutral oil (canola, peanut, or vegetable), for deep frying (adjust to pot size) - 2 tsp (10 g) kosher salt, plus more for finishing - 1/2 tsp (2 g) black pepper (optional) - Malt vinegar, for serving (optional)
1. Prepare potatoes: Peel the potatoes if desired and cut into 1/4–3/8-inch (6–10 mm) thick sticks. Try to keep pieces uniform for even cooking. 2. Soak and rinse: Place the cut potatoes in a bowl of ice water (use the 4 cups/960 ml) and let soak at least 30 minutes, up to overnight in the refrigerator, to remove excess starch. Rinse briefly under cold water after soaking. 3. Dry thoroughly: Drain the potatoes and spread them on a clean kitchen towel or layers of paper towels. Pat completely dry; excess moisture will cause oil splatter and reduce crispness. 4. First fry — blanch: Heat the oil in a deep pot or Dutch oven to 300°F (150°C). Fry the potatoes in batches, not overcrowding, until they are tender but pale (about 4–6 minutes per batch). Use a slotted spoon to transfer fries to a wire rack set over a sheet pan to drain and cool. 5. Increase heat: When all batches are blanched and the oil has returned to temperature, raise the oil temperature to 375°F (190°C). 6. Second fry — crisp: Fry the cooled potatoes in batches again until golden brown and crisp, about 2–3 minutes per batch. Drain on a wire rack or paper towels. 7. Season and serve: Immediately toss the hot fries with 2 tsp (10 g) kosher salt (or to taste) and the 1/2 tsp (2 g) black pepper if using. Serve hot with malt vinegar on the side if desired.
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