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How To Reheat Green Bean Casserole

Who doesn’t love green bean casserole with lots of tender beans, mushrooms, french fried onions, and creamy sauce? And it’s often just as good if not better the next day. As long as I can reheat green bean casserole properly the next day, it’s as good as new.

It’s a go-to and family-pleasing side when it comes to Thanksgiving and potluck dinners and it’s one of my top-three favorites. I usually only like the sides anyway, and greebee casserole is perfecto. 

The interesting thing about reheating green bean casserole is that you are basically reheating a side dish that was simply reheated to begin with. At least, using traditional canned beans (comes cooked) and canned mushroom soup (also pre-cooked), the oven just heated this combination the first time, melding flavors. 

Mind blown, right? Which also means that we’ve never had much success reheating green beans a third time. The beans get mushy and the fried onions have given up.

The dish is straightforward to put together plus you can make it ahead of time, store and reheat the leftovers! Just reheat only the servings that you need at a time.

I’ve learned some reheating techniques for green bean casserole and you won’t believe that you can bring back the heavenly goodness of the side in just a few simple steps!

How to reheat green bean casserole

Contents

You can reheat green bean casserole in an oven, on a stovetop, and microwave.

But before you heat that casserole up, ensure that the food is properly stored in the fridge and isn’t left out overnight or more than two hours at room temperature.  

Generally, leftover green bean casserole will last for up to four days in the fridge when stored correctly.

How to reheat green bean casserole in an oven

The oven method is an excellent choice for reheating green bean casserole. especially if you have a large batch that you need to heat up at one time.

This reheating technique ensures that your food will heat up evenly and you won’t dry it out. 

Just make sure to cover it with aluminum foil as this prevents the edges from burning and preserves the lovely crisp topping as much as possible.

Here are the steps on how to reheat green casserole in an oven: 

Tools needed:

    • Leftover green bean casserole
    • Aluminum foil
    • Oven-safe dish
    • Oven
    • Toppings (if desired)

Instructions:

    1. Preheat oven to 350°F .
    2. Put your green bean casserole in an oven-safe dish then cover with aluminum foil. 
    3. Heat for 20 minutes. Add additional 10 minutes if the casserole isn’t thoroughly heated. 
    4. After heating for 20, remove the foil, add more fried onions or other toppings of your choice, then reheat for an additional 10 minutes. 
    5. Take it out from the oven and let your bubbling casserole rest for a few minutes before serving. 

Reheating tip #1: If you happen to take out the casserole from the refrigerator, be sure to let the servings rest for 20 minutes before reheating it. 

Reheating tip #2: Don’t forget to cover your casserole with aluminum as this helps prevent the edges from burning. 

Also, be careful not to burn yourself while removing the aluminum foil. 

Reheating tip #3: You can adjust the baking time depending on how thick your casserole is. 

Generally, it takes 20 minutes, but you can shorten it to 15 if you’re reheating a small batch. 

Reheating tip #3: It’s best if you check the casserole every 5-10 minutes while it’s reheating.

How to reheat green bean casserole on a stovetop

It’s possible to reheat casserole on a stove using a cast-iron skillet or nonstick frying pan. 

Though it requires a bit more hands-on, reheating the food this way can lead to a desirable result. 

Here are the steps to reheat your green bean casserole using a nonstick frying pan: 

Tools needed:

    • Leftover green bean casserole
    • Cast iron skillet 
    • Stovetop
    • Toppings (if desired)

Instructions:

    1. Remove your green bean casserole from the fridge and let it rest for 20 minutes. 
    2. Use a non-stick spray or butter to your nonstick frying pan. 
    3. Heat the pan over medium to low heat. 
    4. Place the green bean casserole, put some toppings to your liking, then reheat. Cover the pan if necessary.

Pro tip: Reheating green beans on a stovetop is quite easy and it’s best that you’ll monitor the casserole throughout the whole process to avoid ruining the food.

How to reheat green bean casserole in a microwave

If you’re in a hurry and you want to warm that leftover green bean casserole, then the microwave is your best friend!

This method is also best if you’re going to reheat smaller portions of your green bean casserole. 

Here are simple steps on how to store green bean casserole in the microwave:

Tools needed:

    • Leftover green bean casserole
    • Microwave
    • Microwave-safe container or dish

Instructions:

    1. Place your green bean casserole in a microwave-safe container or dish.
    2. Cover it with plastic wrap, but leave it partially open to release excess steam. 
    3. Turn the microwave to the medium heat setting and start by heating for a minute. 
    4. Stir the casserole and heat it again in 30- to 60-second intervals.

Pro tip: You can add some toppings such as French-fried onions, cheddar cheese, parmesan cheese, caramelized onions, bread crumbs, or crumbled potato chips!

Tips on storing green bean casserole

There’s nothing like eating green bean casserole on Thanksgiving and potluck dinners. 

It’s a real treat that people love to eat, especially when topped with French fried onions, and lots of cheese (yes, please!).

But since this comfort food typically contains cheese, milk, cream, and cooked green beans, it could become contaminated if left out at room temperature and isn’t stored properly. 

According to the USDA, perishable food like casseroles that has been left out at temperatures ranging 40°F and 140°F for more than two hours is considered unsafe. 

To solve this dilemma, I’ve compiled some essential tips on storing green bean casserole so you can enjoy the food until its fourth day in the fridge.

  1. Don’t leave your green bean casserole at room temperature for more than two hours as this can attract bacteria due to it being exposed. 
  2. Once you’re done eating, place the leftovers in your fridge to keep the bacteria at bay. 
  3. When storing green bean casserole leftovers in the fridge, ensure to put the food in an airtight container with a lid. 
  4. Leftover green bean casserole can last for four days in the fridge. Freezing green bean casserole causes the dish to become watery, and the fried onions lose their crunch so we don’t recommend it.

How long will green bean casserole leftovers last?

As mentioned, you can keep your green bean casserole leftovers fresh for up to four days in the refrigerator. 

When you’re ready to bring back the creamy indulgence of your stored green bean casserole, simply remove only the portions you need at the time, choose your desired reheating method, then start heating the dish!

The bottom line

We all know that the day after Turkey day is a time of barely coherent laziness and a strange hunger that only carbs, gravy, and green bean casserole can satisfy. 

Reheat your green bean casserole in the oven for the best return to goodness, but you can also just add a serving to your plate and reheat in the microwave and toss more/new/fresh french-fried onions on top (the best part, am I right?).

How To Reheat Green Bean Casserole In An Oven

How To Reheat Green Bean Casserole In An Oven

The oven is the best way to reheat green bean casserole to keep that crunchy topping going the next day!

Ingredients

  • Leftover green bean casserole
  • Aluminum foil
  • Oven-safe dish
  • Oven
  • Toppings (if desired)

Instructions

  1. Preheat oven to 350°F 
  2. Put your green bean casserole in an oven-safe dish then cover with aluminum foil. 
  3. Heat for 20 minutes. Add additional 10 minutes if the casserole isn't thoroughly heated. 
  4. After heating for 20 mins, remove the foil, add toppings of your choice, then reheat for an additional 10 minutes. 
  5. Take it out from the oven and let your casserole rest for a few minutes before serving.

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