This guide covers the classic French fry outline—the cutting method that turns a potato into uniform, crispy fries. Whether you prefer thin shoestrings or thick steak fries, mastering the outline (slicing the potato into even planks, then sticks) ensures they cook evenly and crisp up properly.
Ingredients
- 4 large russet potatoes (about 2 lb / 900 g)
- 1 quart (1 L) cold water, for soaking
- 2 tbsp (30 ml) white vinegar (optional, for extra crispness)
- Vegetable oil, for frying (about 4 cups / 1 L)
- Kosher salt, to taste
Instructions
- Prep the potatoes: Scrub the potatoes well but do not peel them (peeling is optional). Pat them dry with a clean towel.
- Cut the outline: Slice off a thin piece from one side of a potato so it sits flat on the cutting board. Cut the potato lengthwise into 1/4-inch (6 mm) thick planks. Stack 2–3 planks and slice them lengthwise into 1/4-inch (6 mm) wide sticks. Repeat with the remaining potatoes. For thicker fries, cut 1/2-inch (12 mm) planks and sticks.
- Soak (optional but recommended): Place the cut fries in a large bowl and cover with the cold water and vinegar (if using). Soak for at least 30 minutes, or up to 2 hours, to remove excess starch. This helps them crisp up.
- Dry thoroughly: Drain the fries and spread them on a clean kitchen towel or paper towels. Pat them very dry—any moisture will cause splattering and soggy fries.
- Heat the oil: Pour the oil into a heavy pot or Dutch oven, leaving at least 3 inches (7.5 cm) of headspace. Heat over medium-high until a deep-fry thermometer reads 325°F (163°C).
- First fry (blanch): Working in batches, add the fries in a single layer. Fry for 4–5 minutes, until they are soft and pale golden but not browned. Remove with a slotted spoon and drain on paper towels. Let them cool completely (about 10 minutes).
- Second fry (crisp): Increase the oil temperature to 375°F (190°C). Return the fries in batches and fry for 2–4 minutes, until golden brown and crispy. Drain on fresh paper towels.
- Season: While hot, sprinkle with salt. Serve immediately.
Tips
- Use starchy potatoes: Russets or Idaho potatoes give the crispiest results. Waxy potatoes like red or new potatoes will be less crisp and more dense.
- Don’t skip the soak: Even 15 minutes helps. The water washes away surface starch that can make fries stick together and soften.
- Double-fry for best texture: The first fry cooks the inside, the second fry crisps the outside. If you’re short on time, you can do a single fry at 375°F (190°C) for 5–7 minutes, but they won’t be as crunchy.
- Keep the oil temperature steady: If the oil drops too low, fries absorb oil and become greasy. Fry in small batches and let the oil come back to temperature between batches.
Serving Suggestions
Serve these fries hot with classic accompaniments: ketchup, malt vinegar, or aioli. They also pair well with burgers, fried fish, or as a side to a steak. For a loaded version, top with melted cheese, bacon bits, and green onions.
Variations
- Seasoned fries: After salting, toss with garlic powder, paprika, or dried herbs.
- Sweet potato fries: Substitute sweet potatoes; cut them slightly thicker (1/2 inch / 12 mm) and fry at a lower temperature (350°F / 177°C) to avoid burning.
- Baked version: Toss the cut fries with 2 tablespoons (30 ml) of oil and spread on a baking sheet. Bake at 425°F (218°C) for 25–30 minutes, flipping halfway, until golden and crisp.
- Curly fries: Use a spiralizer or a curly fry cutter to create corkscrew shapes; adjust frying time to 3–5 minutes per batch.
Storage and Reheating
Store leftover fries in an airtight container in the refrigerator for up to 3 days. To reheat, spread them on a baking sheet and bake at 400°F (204°C) for 5–8 minutes, or until hot and crispy. Avoid microwaving, as it makes them soggy. For longer storage, freeze the blanched (first-fried) fries in a single layer, then transfer to a freezer bag for up to 3 months. Fry from frozen at 375°F (190°C) for 3–5 minutes.
Frequently Asked Questions
Can I use olive oil for frying? Yes, but use a light olive oil with a high smoke point (about 410°F / 210°C). Extra-virgin olive oil has a lower smoke point and will burn.
Why are my fries soggy? Sogginess usually comes from not drying the potatoes well, overcrowding the pan, or frying at too low a temperature. Ensure the fries are dry and fry in small batches.
Can I skip the soaking step? Yes, but the fries will be less crisp and may be more prone to sticking together. Soaking also helps remove some natural sugars that can cause over-browning.
How do I get extra crispy fries? After soaking, dry thoroughly, then toss with a little cornstarch (about 1 tablespoon per 2 pounds of potatoes) before frying. This adds a light coating that crisps up nicely.
Can I make the fries ahead of time? Yes, you can blanch them (first fry) up to 2 hours ahead, then do the second fry just before serving. Or freeze the blanched fries as described above.
Is it safe to reuse the frying oil? Yes, let it cool, strain through a fine-mesh sieve to remove bits, and store in a sealed container in the fridge for up to 1 month. Discard if it smells rancid or foams excessively when reheated.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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