Knowing when French fries are done frying is crucial to achieving the perfect crispy and golden-brown texture. Here are some signs to look for:
Color: Keep an eye on the color of the fries. As they cook, they will go from pale to golden brown. You want them to be evenly golden all around.
Texture: The fries should have a crispy and crunchy exterior while remaining soft and fluffy on the inside. Test the texture by cutting one fry open or tasting it.
Bubbling: During the frying process, you'll notice that the oil around the fries will bubble vigorously at first. As the fries cook and moisture evaporates, the bubbling will gradually decrease.
Floating: When you first add the fries to the hot oil, they may sink to the bottom. As they cook, they will start to float to the surface. This is an indicator that they are cooking and getting closer to being done.
Cooking time: The cooking time will vary depending on the thickness of the fries and the temperature of the oil. Typically, it takes about 3 to 5 minutes for thin-cut fries and 5 to 7 minutes for thicker-cut fries.
Crispiness to touch: Carefully remove one fry from the oil using tongs and gently press it with a fork or your finger. If it feels crispy and doesn't give too much, it's likely done.
Temperature: If you have a kitchen thermometer, you can use it to check the internal temperature of the fries. They should reach an internal temperature of about 190°C (375°F) when fully cooked.
Drain excess oil: Once you believe the fries are done, remove them from the oil and place them on a paper towel-lined plate or wire rack to drain any excess oil.
Remember, it's essential to monitor the frying process closely as the cooking time can vary depending on the type of potato, thickness of the fries, and the temperature of the oil. Overcooking can result in burnt and overly crispy fries, while undercooking will leave them pale and soggy. With practice and observation, you'll be able to perfect your French fry cooking skills and achieve the desired result.