How to Freeze and Reheat Casseroles  (2024)

Chances are you've been gifted or have gifted a frozen casserole at some point in your life — whether it was to welcome a new baby (and give the parents a break), express sympathy, or simply to treat a loved one to a home-cooked meal.

But as thoughtful as these make-ahead meals can be, they don't always work in actuality. I can remember receiving a make-ahead freezer lasagna from a well-meaning friend, but once it came out of the oven it was, well, a pile of mush.

Here's the good news: there's an easy way to freeze and reheat casseroles for delicious future dinners. You'll be a meal-prep pro in no time. Here you'll learn how to freeze and reheat casseroles like a meal-prep pro.

Can You Freeze Casseroles?

Yes, you can freeze casseroles, but some ingredients hold up better in the freezer than others. And while some casseroles are better frozen uncooked, others should be frozen after cooking, but more on that below.

Should You Freeze a Casserole Before or After You Cook It?

So, do you bake your casserole, let it cool, and then freeze it? Or do you freeze it before it goes in the oven? The answer depends on what's in it.

Casseroles with raw protein (meat, poultry, seafood) should be completely cooked before freezing. However dishes with pre-cooked meats or no meat are fine to go in the freezer uncooked. In fact, it's best to freeze meatless casseroles uncooked as the process of baking, freezing, and re-baking can alter the texture of some ingredients.

Types of Casseroles That Don't Freeze Well

Not all freezer casseroles are created equal. Certain ingredients absorb water when baked. Once frozen, this water crystallizes and evaporates as steam when re-warmed in the oven. The result? Mushy casseroles with a grainy texture.

Avoid freezing casseroles made with dairy products (especially soft cheeses with a high-water content like ricotta or cottage), eggs, starchy vegetables, and watery vegetables like lettuce and cucumber.

Looking for some delicious freezer-friendly casserole recipes? Check our our 15 Make-and-Freeze Casseroles for Time-Saving Dinners.

How to Freeze Casseroles

Best Containers for Freezing Casseroles

A freezer-safe casserole dish is the most convenient option, as it can go from the oven to the freezer or vice versa. But this type of dish can be bulky and take up valuable freezer space. So, we recommend lining your dish with aluminum foil with an overhang and removing it from the dish once frozen. The layer of foil also prevents your baking dish from cracking, which is a potential risk when going straight from the freezer to the oven. Here's how:

Instructions:

  1. Line a freezer-safe baking dish with aluminum foil, leaving an overhang on all sides. Assemble your casserole. If you plan to pre-cook your casserole, do this now.
  2. Use the extra flaps of foil to cover the cooked (or uncooked) casserole. Transfer the entire dish to the freezer and freeze for 24 to 36 hours.
  3. Once the casserole is completely frozen, use the foil to lift it out of the baking dish. Wrap the casserole in plastic wrap, and label it with the date using a piece of masking tape. You can also include reheating instructions and the recipe name..
  4. Store in the freezer.

How Long Can You Freeze Casserole for?

Frozen casseroles will last for up to six months when stored using the above method, assuming your freezer is set to 0 degrees F or colder. While the casserole will be safe to eat for up to six months, the quality may begin to deteriorate at the three-month mark.

How to Safely Thaw and Reheat Casseroles

Do not thaw your casserole before baking. As it thaws, liquid may begin to pool, resulting in a casserole with a soggy bottom.

Instead, simply remove the casserole from the freezer, discard all wrapping, place it in a baking dish, and bake.

A general rule of thumb for cooking a frozen casserole is to cook it for twice as long as the recipe calls for, but at the same temperature. Cover the casserole with foil to keep the top layer from burning, and remove the foil for the last 15 minutes or so of cooking.

Use a digital thermometer to test the casserole for doneness — once the internal temperature reaches 165 degrees F, you're good to go! Add any delicate garnishes like herbs after cooking, and serve.

Related:

  • How to Freeze the 10 Most Common Leftovers
  • How Long Do Leftovers Last?
  • Browse our entire collection of Casserole Recipes.
How to Freeze and Reheat Casseroles  (2024)

FAQs

How to Freeze and Reheat Casseroles ? ›

After cooking, let the hot casserole cool a bit, then carefully remove it from the pan by lifting the foil on both sides. Wrap the casserole in the foil, then wrap it again in another layer or two. Label the foil, then store it in the freezer until you're ready to reheat.

Is it better to freeze casseroles cooked or uncooked? ›

The answer depends on what's in it. Casseroles with raw protein (meat, poultry, seafood) should be completely cooked before freezing. However dishes with pre-cooked meats or no meat are fine to go in the freezer uncooked.

How do you freeze homemade casserole? ›

In either case, make sure the casserole dish is tightly covered with foil before freezing. But, perhaps the best trick to line your baking dish with heavy duty foil, then build the casserole in the foil-lined dish, fold the foil over the top, then freeze.

How to reheat a casserole without drying it out? ›

The best way to prevent it from drying out is to add a little bit of water, around ¼ cup, to the top of it. Allow the water to seep between the food and the sides of the baking dish. Cover with aluminum foil to seal in the moisture.

Can I cook a frozen casserole without thawing? ›

Yes. It is safe to reheat frozen leftovers without thawing, either in a saucepan or microwave (in the case of a soup or stew) or in the oven or microwave (for example, casseroles and combination meals). Reheating will take longer than if the food is thawed first, but it is safe to do when time is short.

How do you freeze and reheat a casserole? ›

How to Freeze Casseroles So They Taste As Fresh As the Day You Made Them
  1. Don't Cook the Casserole Completely.
  2. Cool Off the Casserole.
  3. Seal the Dish Correctly.
  4. Thaw Before Cooking.
  5. Add the Finishing Touches Later.
Jan 12, 2024

What casseroles do not freeze well? ›

1. Avoid freezing dairy-heavy casseroles. Yes, dairy-heavy casseroles are delicious, but cottage cheese, sour cream or creme fraiche won't hold up in the freezer. Instead, polish this kind of casserole off right away—or store leftovers in the refrigerator in an airtight container for 2-3 days.

What container do you freeze casserole in? ›

Best Containers for Freezer Meals:

Use gallon sized bags for family size freezer meals and quart sized bags for individual sized meals or dinners for two. Bags prevent freezer burn as long as you ensure you get all the air you can out of the bag before sealing.

Can you freeze a casserole in an aluminum foil pan? ›

Foil pans work well for freezing foods you'll re-heat in the oven. You can bake food in foil pans and then freeze it in the baking pan. Cover pan tightly with freezer-quality foil, paper, plastic wrap or a plastic bag. Plastic freezer/microwave safe containers are a good choice for foods you'll reheat in the microwave.

What meals freeze and reheat well? ›

Reheat-and-Eat Dinners
  • 1 / 10. Slow Cooker Pasta e fa*gioli. ...
  • 2 / 10. Stir-Fry Freezer Meals. ...
  • 3 / 10. Slow-Cooked Bolognese Sauce. ...
  • 4 / 10. Baked Ziti. ...
  • 5 / 10. Slow Cooker Beef Stroganoff. ...
  • 6 / 10. Easy Vegetarian Tikka Masala. ...
  • 7 / 10. Easy One-Pot Chicken Taco Soup. ...
  • 8 / 10. Slow Cooker Pork Carnitas.

Should you cover a casserole when reheating? ›

Should you cover food when reheating it in the oven? Yes! To prevent an overcooked, dry casserole, cover the baking dish tightly with aluminum foil. This eliminates any moisture loss when using the oven method—keeping everything nice and juicy.

How to thaw a frozen casserole quickly? ›

In cold water: Place the frozen food in a leak-proof bag and place in a large container of cold water. In a microwave on the defrost setting: Plan to cook the food immediately after it has thawed in a microwave, because some areas of the food might have begun cooking during the defrost cycle.

Can I put a cold casserole dish in the oven? ›

In the case of casseroles, leftovers should actually never be added to a preheated oven. The reason is simple: the cold casserole dish may crack.

What temperature do you reheat casseroles in the oven? ›

To reheat casseroles in the oven, from single portions to entire casseroles, it's best to let the leftovers come to room temperature first. This will prevent baked or unbaked casseroles from becoming dried out while they reheat. Cover with foil and reheat in a 350ºF oven until hot throughout.

Is it better to freeze food raw or cooked? ›

Plus, cooked meat doesn't last as long in the freezer, so it's better to portion out the meat still raw than to cook and refreeze it as a stew or braise. When you get meat from a butcher shop, it's usually in its most freezer-friendly packaging already.

Is it better to freeze an egg casserole, cooked or uncooked? ›

In general, freezing your casserole before baking may yield better results with the dish's texture.

What is the best way to store cooked food in the freezer? ›

Use "freezer" bags, not "storage" bags for storing food in the freezer. Freezer bags are thicker than storage bags and will keep the food fresh longer. Speed freezing and hasten thawing by freezing foods in a thin, flattened shape in freezer bags. A rounded shape takes longer to thaw through to the middle.

What are the disadvantages of freezing cooked food? ›

Frozen Food: Disadvantages

One of the biggest and most known disadvantages of cooking frozen foods is that it has the potential to remove much of the flavor obtained when consuming the fresh version. In addition, many foods lose nutrients and vitamins once they have been frozen.

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