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Turn leftover homemade or boxed mac and cheese into a hot school lunch. Here, you’ll learn how to reheat mac and cheese so it stays creamy and how to pack it in a thermos so it’s still warm at lunchtime.

Making It for Lunch
- Heat the thermos
Fill a thermos with boiling water, close the lid, and let it sit for 5 minutes while you reheat the macaroni and cheese. - Warm it up
Place one serving (1 to 1 ½ cups) of leftover mac and cheese in a microwave-safe bowl with 2 tablespoons of milk or water. Heat until it’s piping hot and stir well to bring back the creamy texture. - Pack it for lunch
Empty the water from the thermos and immediately fill it with the hot mac and cheese. Close the lid and pack it inside a lunch bag with fruit, veggies, and your kids’ favorite lunch sides.

Laura’s School Lunch Packing Tips
Mac and cheese thickens as it cools. A splash of milk or water loosens the sauce so it becomes creamy again once it’s heated.
You don’t have to, but it helps keep hot lunches warm much longer, making it worth the extra 5 minutes.
Absolutely. This packing method works with homemade mac and cheese, boxed mac and cheese, or leftovers from dinner.
Yes! In fact, my kids love finding mac and cheese Alfredo, roasted veggie mac and cheese, and cottage cheese mac and cheese inside their thermos. These homemade recipes reheat great and are winners for lunch!
More Ways to Make Lunch Easier
If mac & cheese is a favorite lunch, here are a few more thermos lunches worth adding to your rotation:
How to Pack Mac & Cheese in a Thermos

Watch How It’s Made:
Ingredients
- 1 cups prepared macaroni and cheese
- 2 tablespoons milk
Instructions
Make it
- Place the mac and cheese and milk in a microwave-safe bowl. Heat until piping hot, stirring halfway through until the sauce is creamy.
Pack for Lunch
- Fill a thermos with boiling water and let it sit for 5 minutes. Empty the water, immediately add the hot mac and cheese, and close the lid tightly. Pack the thermos inside a lunch bag with your favorite sides.
Notes
- This method works with homemade or boxed mac and cheese.
- Reheating with a splash of milk or water helps restore the creamy texture.
- A preheated thermos keeps lunch warmer for longer.










Pansy says
My kids are so excited to be able to pack macaroni and cheese for lunch now!
Frances says
I would never think to put mac and cheese in a thermos!! My kids loved their lunches today and I am so glad it stayed warm with your helpful tips!