Skip to Content

How to Reheat McDonalds Fries in an Air Fryer for Optimal Crispness

There’s no denying the allure of McDonald’s fries. They’re golden, crispy, and perfectly seasoned, making them a fast food favorite worldwide. But, let’s face it, when it comes to taste, day-old cold fries don’t exactly hit the spot. So, how to reheat McDonald’s fries to recapture that tantalizing taste and crispness? Today, we’re going to share some secrets on how to reheat McDonald’s fries in an air fryer for optimal crispness. So, next time you’ve got a box of cold fries laying around, don’t toss them; instead, revive those delicious morsels using these simple methods.

Understanding the Problem with Leftover Fries

Before we dive into the best way to reheat McDonald’s fries, it’s crucial to understand the problem with leftover fries. The primary issue is that they lose their crispness and become soggy. This is due to the moisture content that causes the fries to become soft once they cool down. So, the trick is to eliminate the moisture without drying out the fries.

Close-up shot of soggy fries alongside crispy McDonald's fries for comparison

Preparing your Fries for Reheating

First things first, you’ll want to bring your leftover McDonald’s fries to room temperature. This step is crucial as it helps the fries heat evenly, preventing them from becoming too dry or too soggy. Once your fries have reached room temperature, prepare a baking sheet lined with parchment paper or aluminum foil. Spread your fries out in a single layer on the baking sheet. This will ensure that each fry gets evenly heated, giving you the best results.

Spread of McDonald's fries on a baking sheet

The Air Fryer Method

Now to the main event: how to reheat McDonald’s fries using an air fryer. This is arguably the best method for achieving crispy fries. Start by preheating your air fryer to 350 degrees Fahrenheit. While it’s heating up, lightly spray your fries with a thin layer of oil; olive oil or any other oil with a higher smoke point will do. Place the fries in the air fryer basket, making sure they’re spread out evenly. Cook them for 3-5 minutes, shaking the basket halfway through to ensure even cooking. Remove your fries when they reach your desired level of crispness and enjoy!

McDonald's fries in an air fryer basket

Other Options for Reheating McDonald’s Fries

While the air fryer is a great option for reheating McDonald’s fries, it’s not the only method. You can also use a toaster oven, conventional oven, or a microwave. However, the results might not be as crispy as the air fryer method.

The Toaster Oven Method

Reheating McDonald’s fries in a toaster oven is another good option. Preheat your toaster oven to 400 degrees Fahrenheit and place your fries on a baking pan. Bake them for about 5 minutes, or until they’re crispy to your liking. The high temperature of the toaster oven helps to swiftly evaporate any lingering moisture, resulting in a crisp finish.

The Microwave Method

While the microwave method may not yield the crispiest results, it’s a quick and easy way to reheat McDonald’s fries. Simply spread your fries on a microwave-safe plate, cover them with a damp paper towel, and heat them for 20-30 seconds. The damp paper towel helps to keep the fries from drying out too much.

McDonald's fries in a microwave

Reheating Other McDonald’s Foods

It’s not just McDonald’s fries you can rejuvenate; other goodies like chicken nuggets can also be reheated in similar ways. Using the same methods as reheating fries, you can enjoy your leftover McDonald’s feast the next day just as you did when it was fresh.

Freshly reheated chicken nuggets alongside McDonald's fries


So, the next time you find yourself with leftover McDonald’s fries, don’t let them go to waste. With these easy methods, especially the air fryer method, you can enjoy crispy, delicious fries anytime. So, grab that leftover box, preheat your air fryer, and get ready to savor those golden, crispy McDonald’s fries once again!

Crispy McDonald's fries served on a plate

Reheating McDonald’s Fries: The Perfect Way Recipe

Reheating McDonald’s Fries: The Perfect Way Recipe

Yield: 2 Servings
Prep Time: 5 minutes
Cook Time: 10 minutes
Total Time: 15 minutes

This recipe provides a foolproof method to revive those cold, soggy McDonald's fries back to their former crispy, golden glory. Enjoy your leftover fries as if they were fresh from the restaurant with this easy to follow guide.


  • Leftover McDonald's Fries
  • Baking Sheet
  • Parchment Paper
  • Oven


  1. Preheat your oven to 450°F (232°C).
  2. Line a baking sheet with parchment paper.
  3. Arrange your leftover McDonald's fries in a single layer on the prepared baking sheet.
  4. Put the sheet in the oven. Let them heat up for about 5 minutes, then flip them over and continue to bake for another 5 minutes, or until they are hot and crispy.
  5. Serve immediately after taking them out of the oven.


For an added touch, you could sprinkle some sea salt or parmesan cheese on your fries after they come out of the oven. Remember, all ovens are different, so keep an eye on your fries to prevent them from burning.

Nutrition Information:
Yield: 1 Serving Size: 1
Amount Per Serving: Calories: 365Total Fat: 17gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 8gCholesterol: 0mgSodium: 266mgCarbohydrates: 48gNet Carbohydrates: 44gFiber: 4gSugar: 0gSugar Alcohols: 0gProtein: 3g

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest

Skip to Recipe