How to Make Crispy Fries
For fries that are crisp on the outside and soft inside, reduce the surface starch, dry the potatoes completely, and maintain the oil temperature with two-stage frying.
Quick Answer
The three essentials for crispy fries are reducing surface starch, drying the potatoes completely before frying, and cooking them in two stages without letting the oil temperature drop. Soak evenly cut potatoes in cold water for 15–30 minutes and dry them thoroughly; cook the centers first at approximately 160–165 °C, then rest the potatoes before frying them briefly a second time at 185–190 °C. Add salt just before serving.
In This Guide
Key Reasons
When potatoes are fried, the water on their surface first turns to steam; most of this moisture must escape for the outside to become crisp. Excess surface starch can make the potatoes stick together, while a wet surface can cool the oil quickly and cause dangerous splattering.
- Even cuts: Ensure that all the pieces cook in the same amount of time.
- Soaking in cold water: Reduces surface starch. The FDA reports that soaking in water for 15–30 minutes may also reduce acrylamide formation during frying.
- Thorough drying: Helps a crust form more quickly and reduces oil splattering.
- Two frying stages: The first, at a lower temperature, cooks the inside; the second, at a higher temperature, crisps the outside.
- Golden color: Leaving the fries golden rather than very dark brown may help reduce overcooking and acrylamide formation.
Proper Application
- Choose firm, high-starch potatoes suitable for frying. Cut the potatoes into evenly sized sticks approximately 8–10 mm thick.
- Soak the cut potatoes in cold water for 15–30 minutes; if the water becomes very cloudy, replace it once.
- After draining, dry the potatoes with a clean cloth or paper towel until no water remains on the surface.
- Heat the oil to approximately 160–165 °C in a deep, heavy-based pot. Do not overcrowd the pot.
- Fry the potatoes in batches for approximately 3–5 minutes the first time, until tender but not colored. Let them rest on a wire rack for 10–20 minutes.
- Raise the oil temperature to 185–190 °C. Fry the potatoes a second time for 2–3 minutes, until golden and crisp.
- Transfer the fries to a wire rack or paper towel; season with salt while they are still hot and serve immediately.
Common Mistakes
Putting Wet Potatoes into Hot Oil
Why it causes problems: The oil splatters dangerously, the temperature drops, and crisping is delayed.
Correct use: Dry the potatoes completely after draining them.
Overfilling the Pot with Potatoes
Why it causes problems: The oil temperature drops quickly, and the potatoes absorb oil instead of frying.
Correct use: Fry in small batches and wait for the oil to return to temperature between batches.
Frying at Very High Heat in One Stage
Why it causes problems: The outside may darken before the inside is fully cooked.
Correct use: Fry the potatoes at a lower temperature the first time and a higher temperature the second time.
Frying the Potatoes Until Dark Brown
Why it causes problems: The flavor may become bitter, and high heat or prolonged cooking may increase acrylamide formation.
Correct use: Aim for a golden color.
Mayana's Recommendation
- Using a thermometer is the simplest upgrade for making crispy fries without leaving the result to chance.
- Resting the potatoes on a wire rack after the first frying helps the surface steam escape.
- If service will be delayed, fry the second batch just before serving it.
Additional Information
-
For oil safety, do not fill the pot to the brim; hot oil can overflow and splatter when it comes into contact with water. Keep children and flammable materials away from the frying area.
-
Storing raw potatoes in the refrigerator for a long time can cause them to brown more quickly when fried; a cool, dark place is more suitable for storage.
Frequently Asked Questions
Why are potatoes soaked in water before frying?
It helps remove excess starch from the surface. The FDA also states that soaking potatoes in water for 15–30 minutes before frying can reduce acrylamide formation.
Should potatoes be dried before frying?
Yes. Surface moisture both increases oil splattering and lowers the oil temperature, which affects crispness.
Why are potatoes fried twice?
The first fry cooks the inside and sets the structure; the second, hotter fry quickly crisps the outside.
What temperature should fries be cooked at?
With the two-stage method, the first fry can be done at approximately 160–165 °C and the second at around 185–190 °C.
When should salt be added to potatoes?
Salting the potatoes immediately after they come out of the oil, while they are still hot, gives the most balanced result.
Other Cooking Tips and Techniques
Access the other explanations, tips and practical guidance published in the Cooking Tips and Techniques section from a single screen.