How to Reheat Casserole Without Overcooking?

Casseroles are a great addition to a dinner menu. They are not only tasty but are super versatile and can be cooked using any ingredients. The best thing about casseroles is that even the leftovers are as delicious as the original meal. However, you must know the right way of reheating the leftovers as they tend to overcook. So, how to reheat casserole without overcooking it? Let’s find out.

Setting the Temperature

It is first essential to note that vegetable casserole and breakfast casserole can withstand different temperature levels. Therefore, make sure you have the right temperature when reheating theses.

The vegetable casserole can stand high temperatures, but it tends to get soggy when stored in the fridge for a long time. Preheat the oven to 400°F to ensure it gets thoroughly cooked without becoming soggy. The breakfast casserole must be reheated in an oven by preheating the oven to 350°F.

How to Reheat Casserole without Overcooking it

Here are two ways of reheating casserole without overcooking it:

Microwaving It

Both vegetable and breakfast casseroles can quickly be reheated in a microwave. However, there might be chances it doesn’t reheat evenly. This is more suitable method if you have a small portion of casserole left. Here is how to reheat one the right way:

  1. Put the casserole in a microwave safe dish.
  2. Cover it with a plastic wrap or a lid.
  3. Transfer the dish in the microwave and let it reheat for around two to five minutes, as per the size of your casserole.
  4. Check the temperature after every two minutes to make sure it is properly warming up.
  5. The casserole will be ready once it reaches 165°F.

Take out the dish, let is sit for three to four minutes, and serve.  

Using the Oven

Reheating casserole in an oven is the best way to make sure it gets evenly warmed up. It is also the best option to reheat an entire casserole or larger leftover portions. Here is how to use an oven to reheat the casserole:

  1. Start by taking the dish out of the fridge at least half an hour before you start reheating it. Bringing the casserole to the room temperature will reduce the reheating time and encourage even heating.
  2. In the meantime, preheat the oven.
  3. Cover the casserole with a lid or tin foil tightly.
  4. Place the dish in the oven and let it reheat for 20 to 30 minutes. The reheat time is dependent on the quantity of casserole.
  5. Uncover the dish when five to ten minutes are left.
  6. If you prefer a crispier surface, turn on the broiler for a minute or two. Keep a close watch as broiler heat can quickly burn the surface. Once the surface starts turning a crispy brown, then take out the dish.
  7. Let it cool for a few minutes.


The leftover casserole can easily be reheated to taste as good as the first time. You can serve it at dinner, lunch, and even breakfast.