Reheat Casserole in the Oven or Microwave for Deliciously Moist Leftovers: 5 Simple Steps (2024)

Reheat Casserole in the Oven or Microwave for Deliciously Moist Leftovers: 5 Simple Steps (1)

If we're honest, we've enjoyed casserole leftovers for breakfast, lunch, and dinner time, and again - it can make an unconventional breakfast, but a delicious one! There is an art to reheating a casserole without letting it dry out - follow our simple guide to reheat casserole below!

How to Reheat Casserole in Oven or Microwave

Reheating a slice? Try the microwave!

The reheating method you choose depends on the size of your casserole. If you're simply warming up a slice of the casserole for breakfast the next morning, use the microwave - we microwave casserole slices because it's much easier to warm small portions without drying out your piece.

To microwave a cold casserole slice, place it in a microwave-safe dish and cover it loosely. Do not use plastic wrap to cover your casserole dish, as it may melt in the microwave. Instead, place another plate on top of the dish, or use a hard plastic dish cover for use in the microwave.

Microwave in 30-60 second increments until warmed to your liking - usually, 2 minutes is more than enough time to make your casserole piping hot!

Reheating a whole casserole? Use the oven!

If you're reheating casserole from refrigerator temperatures that's already cooked, you'll want to watch how you reheat it, as some casseroles dry out upon second heating. Instead, follow these simple instructions and learn how to warm up a refrigerated casserole perfectly!

Step #1: Remove the casserole from the fridge to warm before cooking.

For the best results, remove your casserole from the fridge 30-60 minutes before baking it. This step is essential to keeping your casserole in the oven for as little time as possible while promoting even heating and protecting your bakeware.

We love the results we get with our cast-iron casserole dish, as it keeps the casserole deliciously moist and is nearly indestructible. One thing cast-iron doesn't like is thermal shock or sudden temperature changes. Putting a cold cast-iron pan in a hot oven may cause your dish to crack, rendering it useless. No bueno!

Step #2: Preheat the oven.

Preheat your oven to 350°F, a nice, middle-of-the-road temperature which won't give your casserole a burnt top or cause it to dry out as it reheats. Place your casserole into an oven-safe container if it isn't already in one.

Step #3: Cover your casserole with foil.

Your casserole's top already bubbled to perfection the first time it cooked and trying to achieve the same results the second time around ends with you trying to eat a dried-out loaf of your casserole's former glory.

Instead, you need to tightly cover the casserole dish with aluminum foil as you reheat, with the option to take the foil off in the last 10 minutes of cooking to up the casserole's crisp-factor.

Step #4: Leave the casserole to cook for 20-30 minutes or until hot throughout.

Reheating times for casseroles vary based on overall size and ingredients, so you'll want to keep an eye on your casserole temperature more than watching how long it cooks.

Give your casserole a stir midway through the cooking process to help the dish heat evenly.

How long to reheat casserole in oven?

Generally, most casseroles reheat within 20-30 minutes, or when the temperature reaches 165°F, making it safe for consumption and enjoyably hot!

Check your casserole's temperature once you hit the 20-minute mark with an oven thermometer - if the casserole isn't yet at 165°F, replace the foil and keep cooking, checking every five minutes.

Step #5: Carefully remove and serve your delicious reheated casserole!

Once your casserole hits 165°F and looks ready to eat, be sure to use oven mitts to remove the extremely hot casserole dish from your oven.

Slice, serve, and enjoy your casserole leftovers with your friends and family!

How long can I keep my casserole in the fridge?

We don't care to admit we've played this dangerous leftover game before, so for food safety concerns, do better than us - eat your refrigerated leftover casserole within three days of cooking. Otherwise, you're taking some chances, and trust us; it's not worth it.

If you don't think you'll get through a casserole fast enough, toss it in the freezer! Which brings us to...

Can I freeze a cooked casserole?

Yes! Freezing a cooked casserole is a great way to make an easy dinner for a busy day when you're out of time. The only catch when working from frozen is that you need to give it time to defrost before you reheat frozen casserole.

Take your frozen casserole out of the freezer and place it in the fridge 24 hours before you cook it or try to bake it straight from frozen in the oven. If you bake frozen casserole, follow the steps above, but keep in mind the baking time will be much longer if you're working with a frozen casserole, and transfer the frozen casserole to a warmer baking dish, or one that can withstand rapid temperature changes.

Final Notes & Our Favorite Tips & Tricks

When you're reheating anything baked, like casserole, keep the goal in mind - you want to warm the food, not cook it until bubbly. If you try to reheat your casserole for too long, the dish's fats may separate from the sauce or cheese, causing an oily mess in the dish.

You can also cut between your casserole portions before you reheat it to help the center heat more quickly, which lessens the chance you'll overcook your leftovers.

Following our steps above, we hope you enjoy your perfectly moist and crispy-topped casserole leftovers again and again!

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Reheat Casserole in the Oven or Microwave for Deliciously Moist Leftovers: 5 Simple Steps (2024)

FAQs

Reheat Casserole in the Oven or Microwave for Deliciously Moist Leftovers: 5 Simple Steps? ›

If you baked your casserole ahead of time, simply cover the dish with foil and reheat at 350˚F until heated through. Depending on the type of dish, you may need to add moisture to keep it from drying out, for example, a splash of milk to baked macaroni and cheese.

How do you reheat a casserole in the oven? ›

If you baked your casserole ahead of time, simply cover the dish with foil and reheat at 350˚F until heated through. Depending on the type of dish, you may need to add moisture to keep it from drying out, for example, a splash of milk to baked macaroni and cheese.

How long to reheat beef casserole in the microwave? ›

Cover with a microwave lid or microwave-safe plastic wrap to trap steam and keep the meal moist. Place plate towards the outside of the microwave turntable. Reheat meal for 2 minutes on high, and then allow to stand for 1 minute. To assist with even heating, turn the plate halfway through the cooking time.

How to reheat leftovers in the oven? ›

Generally, you should reheat dishes at a low temperature like 350°F so they don't dry out. Cover your dish with foil and cook it between 8-20 minutes (depending on the food) until it cooks all the way through. Food like meats or casseroles tend to reheat well in the oven, because they don't typically dry out as much.

How long does a casserole take in the oven? ›

The time a casserole takes to cook will vary from 2-2½ hours for chuck, blade and thick flank, up to 4 hours for shin, leg and neck. Pork cuts for braising and casseroling normally take 1½ hours, and lamb much the same.

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.

How do you keep a casserole warm without drying it out? ›

If you need to keep food warm for the short-term, wrapping or covering with aluminum foil will do the trick. Just keep in mind the foil will keep in the heat for only about 30 minutes or so.

How do you keep meat moist when reheating in the microwave? ›

Place the meat in a microwave-safe dish and cover it with a lid, plate, or other microwave-safe cover. Microwave the meat on full power in short intervals, stirring or flipping it every 30 seconds. This will help to distribute the heat evenly and prevent the meat from drying out.

Can you put a casserole dish in the microwave? ›

Glass and ceramic dishware are usually safe for microwave use, but there are exceptions like crystal and some handmade pottery. When it comes to glass or ceramic plates, bowls, cups, mugs, mixing bowls or bakeware, you should be in the clear as long as it doesn't feature metallic paint or inlays.

How long to reheat leftovers in the microwave? ›

Start off heating the leftovers for 2 minutes on high in your microwave, allowing it to sit for at least 1 minute after. If you feel your meal still isn't warm enough for your liking, reheat for an additional 30 seconds on high. Reheat meat for less time starting off to avoid unwanted chewy or tough textures.

How long to reheat food in the oven at 350 degrees? ›

To ensure foods like casseroles and roast meats do not dry out while reheating in the oven, just cover them with foil. Use a low-temperature like 350 degrees Fahrenheit and cook until the dish is just heated through, depending on the item this could be anywhere from 8 to 20 minutes.

Can you reheat food in oven instead of microwave? ›

While foods high in protein have a greater risk of bacteria, they are usually okay to reheat if you do it correctly. These are relatively easy to cook a second time. The biggest issue tends to be meat going dry, especially if microwaved. Your oven should be your first choice because it retains the most moisture.

What are 2 tips with regards to reheating leftovers? ›

Reheat leftovers to a safe internal temperature of 74ºC (165ºF). Use a digital food thermometer to check the temperature. Bring gravies, soups and sauces to a full, rolling boil and stir during the process. Discard uneaten leftovers after they have been reheated.

How long to warm up a casserole in the oven? ›

Cover the baking tray with aluminum foil and place in a 350ºF oven. The time required for reheating depends on how cold the dish was to start with and the density of the contents. Generally casseroles take about 20-30 minutes to reheat, but use the tips below for checking when it's properly heated throughout.

How do you reheat a casserole in the microwave? ›

A single portion can be reheated on high for 1-2 minute increments until it reaches the desired temperature. Large Portions. The best way to reheat a large portion in the microwave is to break it up into smaller portions and microwave it in 3-5 minute increments.

Do you cover a casserole in the oven? ›

Generally, casseroles with grains, rice or pasta that will cook during the baking process are usually covered, for at least part of the time. Casseroles made of cooked ingredients are usually baked uncovered. If you like a crisper, browner top, be sure the casserole is uncovered for at least part of the bake time.

Should you reheat a casserole covered or uncovered? ›

Should you reheat a casserole covered or uncovered? The best way to reheat it is to cover it and put it into a cold oven. Covering the dish will trap the steam in and keep it moist while it heats.

What is the best way to reheat a pasta casserole? ›

Bake It. If your pasta dish is already coated in sauce, reheating it in the oven could be the best option. Simply place your pasta (sauce and all) in an oven-safe baking dish, cover it with foil and bake at 350℉ for 15 to 20 minutes. This method offers the added benefit of making your dish a little crispy and bubbly.

How long can you refrigerate a casserole before baking? ›

Make it now, but bake it later

Most casseroles can be made ahead and refrigerated for a day or two or frozen up to three months.

Can you reheat slow cooked casserole? ›

Reheating leftovers in a slow cooker is not recommended. Cooked food should be reheated on the stove, in a microwave, or in a conventional oven until it reaches 165 °F. Then the hot food can be placed in a preheated slow cooker to keep it hot for serving—at least 140 °F as measured with a food thermometer.

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