How to Reheat McDonald’s Fries in an Air Fryer

Reheating McDonald’s fries in an air fryer is an excellent way to bring back their original crispiness and warmth, making them taste as good as new. The key to reviving these fries lies in the air fryer’s ability to circulate hot air around the food, crisping them up without making them overly greasy. Here’s a simple guide on how to reheat McDonald’s fries in an air fryer for the best results:

Instructions for Reheating McDonald’s Fries

1. Preheat the Air Fryer

  • Start by preheating your air fryer to 350°F (about 175°C). This step ensures that the fries start reheating immediately and evenly once they’re in the basket.

2. Prepare the Fries

  • If the fries are clumped together, gently break them apart to ensure they reheat uniformly. There’s no need to add oil, as the fries already contain oil from their original cooking.

3. Arrange the Fries in the Basket

  • Place the fries in the air fryer basket in a single layer. This arrangement allows the hot air to circulate around each fry, ensuring they all get crispy. If you have a large quantity, consider reheating them in batches to avoid overcrowding.

4. Reheat the Fries

  • Cook the fries for about 3 to 4 minutes. Shake the basket halfway through the cooking time to help the fries reheat evenly and prevent any from sticking together.

5. Check for Crispiness

  • After the initial cooking time, check the fries for crispiness. If they’re not as crispy as you’d like, you can continue to reheat them in 1-minute increments, checking after each minute to avoid overcooking.

6. Serve Immediately

  • Once the fries have reached your desired level of crispiness, remove them from the air fryer and serve immediately. They’re best enjoyed hot and fresh.

Tips for Perfectly Reheated Fries

  • Don’t Let Them Sit: Air fryer-reheated fries are best eaten right away. The longer they sit, the more they’ll lose their crispiness.
  • No Need to Season: McDonald’s fries are already seasoned, so there’s usually no need to add more salt or seasoning after reheating.
  • Experiment with Temperature: Depending on your air fryer model, you might find that adjusting the temperature slightly higher or lower works better for your specific appliance.


Reheating McDonald’s fries in an air fryer is a quick and effective method to enjoy them as if they were fresh out of the fryer. By following these simple steps, you can ensure your fries are crispy, hot, and delicious every time you have leftovers.

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Bubbly Chef author