How to Double-Fry

Double-frying does to starchy vegetables what searing before cooking does to meats -- it creates a crisp, golden-brown crust that wouldn't develop otherwise. During the first frying, moisture closest to the surface of starchy vegetables evaporates, which allows exterior browning to commence. During the second frying, moisture evaporates a little deeper inside the vegetable, which causes it to brown deeper and form a denser crust. This occurs because starch cells near the surface gain density when resting between the first and second frying. The technique works with all starchy vegetables, but you'll notice the greatest effect when you double-fry french fries.

Things You'll Need

  • Starchy vegetables, such as Russet potatoes
  • Dutch oven, wok or frying pan
  • Frying oil, such as peanut or canola
  • Instant-read or deep-fry thermometer
  • Mesh or slotted spoon
  • Paper towels
  • Sheet pan

Instructions

  1. Peel and cut the starchy vegetables into fries, discs or cubes about 1/4 to 3/8 inch thick. If you're making french fries, cut russet potatoes into 3/8-inch sticks measuring about 2 to 2 1/2 inches long.

  2. Rinse the cut vegetables under cool water and spread them out on a kitchen towel. Blot the moisture from the veggies with paper towels and let them air-dry, about 15 to 20 minutes.

  3. Fill a Dutch oven, wok or frying pan with 3 or 4 inches of peanut, canola, sunflower or other frying oil. Heat the oil on the stove on medium until it reaches 325 degrees Fahrenheit. It's hard to maintain an exact oil temperature, but as long as you keep it within 15 to 20 degrees of 325 F, it's fine. Use an instant-read or deep-fry thermometer to check the oil temperature.

  4. Lower the vegetables into the oil using a mesh or slotted spoon. Fry the vegetables until small bubbles start forming on the surface of them, about 5 to 6 minutes. Stir the vegetables throughout frying.

  5. Lift the vegetables from the oil and transfer them to a sheet pan lined with paper towels. Blot the vegetables with a paper towel. You can store the vegetables in the refrigerator if you want to wait to fry them the second time.

  6. Set the heat to medium-high and bring the oil to 400 F. Return the vegetables to the oil and fry them until crisp, about 2 minutes.

  7. Transfer the vegetables to a sheet pan lined with paper towels to drain, and season to taste while hot.