How to Reheat McDonald’s: Fries, Nuggets, Burgers & More

How to Reheat McDonald's Fries

McDonald’s fries are the item people ask me about most, and honestly, they’re the hardest to get right. Fresh out of the fryer they’re crisp on the outside and fluffy inside — but as they cool, the moisture inside the potato migrates and they go limp fast.

My rule of thumb: if you own an air fryer, use it for fries every single time. The circulating hot air redries the surface starch without needing extra oil.

Best Way to Reheat McDonald's Fries (Air Fryer Method)

1. Preheat the air fryer to 350°F (175°C) for about 2 minutes.
2. Spread the fries in a single layer in the basket — don’t pile them up, or they’ll steam instead of crisp.
3. Air fry for 3 minutes, then shake the basket.
4. Cook 1-2 minutes more if they’re still soft in the middle.

This is genuinely the best way to reheat McDonald’s fries — you get a shatter-crisp outside that’s closer to fresh than any other method I’ve tried.

How to Reheat McDonald's Fries in the Microwave

If you don’t have an air fryer or oven handy, the microwave will get them hot fast, though they’ll be softer, not crispy.

1. Spread the fries in a single layer on a microwave-safe plate.
2. Lay a slightly damp paper towel loosely over the top — this stops them from drying into little bricks.
3. Microwave at 50-70% power for 20-30 seconds.
4. Check, and add 10-second bursts if needed. Don’t go past a minute total, or they turn chewy.

For a similar reheating challenge with another starchy side, see how to reheat hash browns.

How to Reheat McDonald's Fries in the Oven or Toaster Oven

No air fryer, but want crispy? The oven works almost as well, it just takes longer.

1. Preheat your oven or toaster oven to 400°F (200°C).
2. Spread fries on a baking sheet in a single layer, not touching.
3. Bake for 5-7 minutes, flipping once halfway through.

This method is worth it if you’re already reheating a burger or sandwich in the oven at the same time — you can do both on one rack.

How to Reheat McDonald's Chicken Nuggets

Whether it’s regular nuggets, spicy McNuggets, or the ones that came in your kid’s Happy Meal, chicken needs a bit more care than fries because you’re also reheating it for food safety, not just taste.

Cold chicken from the fridge should always be reheated until it hits 165°F all the way through, per USDA food safety guidance on safe minimum internal temperatures. A cheap instant-read thermometer takes the guesswork out of it.

Reheating McDonald's Chicken Nuggets in the Air Fryer

1. Preheat the air fryer to 375°F (190°C).
2. Arrange nuggets in a single layer, leaving space between each one.
3. Air fry for 4 minutes, flip, then continue for 2-3 more minutes.
4. Cut one open to check the center is steaming hot, not just warm — use an instant-read thermometer if you want to confirm 165°F.

This is my go-to for reheating McDonald’s nuggets — the coating comes back genuinely crunchy, which the microwave just can’t do.

How to Reheat McDonald's Nuggets in the Oven

1. Preheat the oven to 350°F (175°C).
2. Spread nuggets on a wire rack set over a baking sheet, if you have one — this keeps the bottoms from getting soggy.
3. Bake 8-10 minutes, checking at 8 minutes for hot centers.
4. If they’re browning too fast on the outside but still cold inside, drop the temperature to 325°F and give them 2-3 more minutes.

How Long to Microwave McDonald's Nuggets and Fries From the Fridge

If you’re microwaving nuggets and fries together straight from an overnight fridge stay, here’s what I’ve found actually works for both to get hot all the way through, not just on one side.

Use medium-high power (around 70%), not full power — full blast cooks the outside before the center catches up, especially on nuggets.

For a half-eaten batch of nuggets, microwave in 30-second bursts, flipping the nuggets over between each burst so both sides heat evenly.

Most fridge-cold nuggets need 60-90 seconds total at 70% power; fries need less, usually 30-45 seconds, since they’re thinner.

Always cut into the thickest nugget afterward to confirm the middle is steaming hot, not just warm — that’s the real test, not the clock. If you’re unsure, check with a food thermometer for 165°F.

How to Reheat a McDonald's Burger or Cheeseburger

Burgers are trickier than fries or nuggets because you’ve got three different textures — bun, patty, toppings — that all reheat differently.

The trick I always come back to is separating everything first. Toppings like lettuce, tomato, and sauce should never go anywhere near heat; pull them off and set them aside to add back at the end.

Reheating a McDonald's Cheeseburger or Big Mac in the Oven

1. Preheat the oven to 300°F (150°C) — lower and slower keeps the patty from drying out.
2. Take the burger apart: patty, cheese, bun, and cold toppings all separated.
3. Wrap the patty (with cheese on top) loosely in foil and place it on a baking sheet.
4. Put the bun directly on the oven rack or a separate tray.
5. Reheat for 8-10 minutes, pulling the bun out after about 3-4 minutes so it doesn’t dry out or go crunchy.
6. Reassemble with the cold toppings once the patty is hot through.

How to Reheat a McDonald's Cheeseburger in the Air Fryer

1. Preheat the air fryer to 325°F (163°C).
2. Separate the patty from the bun and toppings.
3. Air fry the patty for 3-4 minutes.
4. Warm the bun separately for about 1 minute, cut-side down, just to take the chill off.
5. Reassemble with fresh or cold toppings.

This is a fast, reliable way to reheat McDonald’s cheeseburger leftovers when you don’t want to wait on the oven to preheat.

How to Reheat a McDonald's McGriddle in the Air Fryer

The McGriddle’s griddle cakes have that sweet, syrupy edge that turns gummy fast in the microwave, so this is one where the air fryer really earns its keep.

1. Preheat the air fryer to 300°F (150°C).
2. Wrap the whole sandwich loosely in foil to stop the outside from over-browning before the egg and sausage warm through.
3. Air fry for 3-4 minutes wrapped, then unwrap and give it 1 more minute uncovered to firm the griddle cakes back up.
4. Check that any egg or sausage patty inside is hot all the way through before eating.

If you’re doing a whole batch of breakfast sandwiches, treat each one individually rather than stacking — like reheating how to reheat scrambled eggs, egg reheats unevenly when crowded.

How to Reheat a McRib

The McRib is basically a boneless pork patty in barbecue sauce, and the sauce is exactly what makes it tricky to reheat — too much heat and it either burns or turns the bun to mush.

1. Preheat the oven to 325°F (163°C).
2. Scrape most of the barbecue sauce off the patty and set it aside.
3. Wrap the sauce-free patty in foil and heat for 10-12 minutes.
4. Warm the bun separately for the last 2-3 minutes, and warm the reserved sauce briefly in a small pan or the microwave.
5. Reassemble with fresh onions and pickles if you saved them, plus the warmed sauce.

An air fryer works too: patty at 325°F for about 5-6 minutes, bun added for the last minute just to warm through.

How to Reheat a McDonald's Filet-O-Fish in a Toaster Oven

Fish sandwiches lose their crunch fast, and the microwave turns that crispy fish patty into something closer to a fish-flavored sponge.

Filet-O-Fish and Fries Together in a Toaster Oven

1. Preheat the toaster oven to 325°F (163°C).
2. Take the sandwich apart: fish patty, cheese, and bun separated.
3. Place the fish patty directly on the toaster oven rack or a small tray, cheese on top.
4. Add fries to the same tray, spread in a single layer, so they cook alongside.
5. Heat for 6-8 minutes, adding the bun for just the last 2 minutes.
6. Reassemble with the tartar sauce, which you should add cold at the end, not reheated.

This one-tray approach is the easiest way to do a whole meal at once without dirtying multiple pans.

Food Safety Basics for Leftover McDonald's

None of these methods matter if the food sat out too long before it got cold. The FDA’s guidance on cold food storage says perishable food shouldn’t sit at room temperature more than 2 hours — or 1 hour if it’s above 90°F, like in a hot car.

Once it’s in the fridge, McDonald’s leftovers are best eaten within 3-4 days, which lines up with general USDA guidance on refrigerated leftover storage times.

Reheat chicken items — nuggets, McChicken, McNuggets — to an internal temperature of 165°F, checked in the thickest part.

If leftovers smell off, feel slimy, or you’re not sure how long they’ve been in the fridge, it’s not worth the risk — toss them.

This same 165°F rule and the reasoning behind it comes up with other leftover chicken too; see can you reheat cooked chicken twice if you’re working with a second round of leftovers.

Troubleshooting Common Reheating Problems

Even with the right method, things can go sideways. Here’s how I fix the most common issues.

Fries Are Soggy After Microwaving

Symptom: Fries are hot but limp and rubbery.

Cause: Microwaves heat moisture inside the fry, which steams the outside instead of crisping it.

Fix: Finish them in a dry skillet or air fryer for 90 seconds after microwaving to re-crisp the surface.

Nuggets Are Hot Outside but Cold in the Middle

Symptom: The breading is warm, but the center is still cool or icy.

Cause: High heat cooked the outside too fast, especially straight from a cold fridge.

Fix: Drop the power or temperature and extend the time — medium-high in the microwave, or a lower oven temp for longer, always checking the center reaches 165°F with a food thermometer.

Burger Bun Is Soggy or Tough

Symptom: The bun is either damp and falling apart, or dried into a hard shell.

Cause: The bun was reheated alongside the patty and toppings instead of separately, or heated for too long alone.

Fix: Always separate the bun, warm it for the shortest time of any component, and add cold toppings back after reheating, not before.