How to Reheat Frozen Mac and Cheese

Frozen mac and cheese can be bought at the store or it could be from mac and cheese leftovers. Either way, freezing mac and cheese keeps it lasting longer so you don’t have to eat it right away. 

There are a few ways to reheat mac and cheese. Each way is super simple and doesn’t take too much time. There’s reheating it in the microwave, in the oven, and on the stove. Since there are different kinds of frozen mac and cheese, you should decide which method will work the best for it. 

In the Microwave

It is usually not suggested to reheat your food in the microwave due to it changing the food’s taste and texture. With mac and cheese, those aren’t worries. Mac and cheese works well being reheated in the microwave.

The best kinds of frozen mac and cheeses for the microwave are pre-made packages from the store and single servings.

  • Step 1: Make sure your mac and cheese is in a microwave-safe container. Pre-made packages will say if they can be put in the microwave or not. 
  • Step 2: Microwave for 40-second intervals, checking after each interval. With each interval, stir the mac and cheese. Pre-made packages will also tell you how long to microwave the mac and cheese. 
  • Step 3: Once fully reheated, allow to cool and enjoy.
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  • An easy method for single servings
  • Doesn’t take a lot of effort
  • Takes the shortest amount of time


  • Doesn’t work for baked mac and cheese
  • Can’t heat up a ton of mac and cheese at once

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On the Stove

Since many kinds of mac and cheese are made on the stove, you can also reheat it on the stove. This method varies slightly depending on the kind of frozen mac and cheese.

Single Servings in a Plastic bag

Some places sell single servings of frozen mac and cheese packaged in plastic. This makes it really easy to reheat them on the stove.

  • Step 1: Bring a pot of water to a boil
  • Step 2: Place the mac and cheese bag into the water
  • Step 3: Allow the mac and cheese to cook until the bag softens
  • Step 4: Allow to cool and then cut the top. Pour the mac and cheese onto your dish.
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Other Mac and Cheese

You can put your frozen mac and cheese right onto the stove without being in plastic.

  • Step 1: Put your mac and cheese into a saucepan with a tablespoon of milk.
  • Step 2: Heat with medium or low heat and continuously stir.
  • Step 3: If needed, add another tablespoon of milk until it’s the consistency you want.
  • Step 4: Once reheated, remove from heat and plate. 
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  • Good for both single servings and bigger batches
  • Doesn’t take a lot of time or effort


  • Doesn’t work with baked mac and cheese as well

In the Oven

This method works best for reheating frozen baked mac and cheese or frozen mac and cheese casserole. The oven takes the longest, but it can easily be worth it.

  • Step 1: Preheat your oven to 350℉
  • Step 2: Make sure your mac and cheese is in an oven-safe dish and cover with aluminum foil
  • Step 3: Bake the mac and cheese for 20-30 minutes. 
  • Step 4: Remove the foil and bake for another 10 minutes or until the top browns.
  • Step 5: Remove from the oven and enjoy.

If reheating frozen mac and cheese casserole, add a splash of milk to add moisture.

If you are reheating baked mac and cheese, preheat the oven to 375℉ and oil the dish first (this only works if you have to change the dish. If the frozen mac and cheese is already in an oven-safe dish, skip the oil. 


  • It’s not too much effort
  • Best for large batches of mac and cheese
  • Can easily reheat frozen baked mac and cheese or frozen mac and cheese casserole


  • Doesn’t work well for single servings
  • Takes the most time
  • Takes more effort than the other methods
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Should I Thaw the Mac and Cheese First?

You can reheat your mac and cheese straight from frozen using any of the talked-about methods. Thawing the mac and cheese by leaving it in the fridge for a few hours will make the reheating time shorter. It’s about personal preference. 

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Final Thoughts

It is super easy to reheat your frozen mac and cheese to make another tasty meal. Whether you use the microwave, stove, or oven method, you are sure to end up with delicious mac and cheese. The oven is the best for large batches of mac and cheese and you don’t need to shy away from the microwave for this dish.

When you use the best method for the kind of frozen mac and cheese you are reheating, you won’t even be able to tell that it was ever frozen.