How to Reheat Prime Rib Sous Vide?

Wondering how to reheat prime rib?

To reheat a prime rib sous vide, set your oven to the lowest temperature setting, such as 200 degrees F (93 degrees C).

Place the whole sous vide bag into the oven and bake for one hour. When finished, let the prime rib rest for 5 minutes and slice it to serve.

The prime rib will be warm throughout, but not hot.

Reheating in the Oven

When you need to cook an entire prime rib roast, the oven is the best appliance to use. Because a conventional oven distributes heat evenly, it warms up the meat evenly as well, no matter how big it is.

The only downside is that it takes a lot of time to reheat in the oven compared to other methods. The result is something to be proud of.


  • Preheat the oven to 300 degrees F.
  • Wrap the roast in aluminum foil and leave a pit on top. The space can be used to pour a quarter cup of leftover beef stock. The rib must stay moist in the oven. The rib should be covered with aluminum foil.
  • The roast should be in the oven for 10 minutes. The thickest part of the roast is a good place to insert a meat thermometer to test doneness. It is done when the temperature reaches at least 160 degrees.
  • Now stop cooking and transfer the steak onto a plate. Let it rest for five minutes to redistribute its juices.

Using a Steamer to Reheat

The steamer is the way to go if you want to reheat a slice of prime rib. The advantage of using the steamer is that prime rib can be reheated quickly.

The downside is that it doesn’t distribute the heat evenly. If the meat is thick, there is a chance that you will get some cold parts with the steamer.

I only recommend it for a slice of rib, instead of a whole roast, because of this. The small and thin slices can be reheated evenly.


  • First, fill the pot with one or two inches of water and then start boiling it.
  • The rib is wrapped in foil and a small pit is left on top. To keep the meat moist, pour some leftover Au jus or beef stock through the hole and seal the gap.
  • Now place the meat inside the steamer and cover it with a lid.
  • Depending on the thickness of the meat, it can be steamed for 3 to 6 minutes. The thickest part of the roast is a good place to insert a meat thermometer to test doneness. It is done when the temperature reaches 160 degrees F.
  • Now stop cooking and transfer the steak onto a plate and serve right away.

Reheat in the Microwave

I am not a fan of this method, but I do recognize that it is the fastest and most convenient way to cook food.

You can use the microwave as the last resort if you don’t have the time to cook prime rib using the other methods.

It is important to be aware that your prime rib will not be as juicy as it was freshly cooked.

It’s a good idea to reserve this method for smaller slices of prime rib, instead of thick cuts or an entire roast.


  • Slice the prime rib into equal slices.
  • Place them in a microwave safe-dish.
  • To keep the meat moist, pour some leftover Au jus or beef stock.
  • Cover the dish with a microwave-safe lid or plastic wrap.
  • Microwave on high for 1 minute.
  • Check the internal temperature if it reaches 160 degrees F.
  • If not, continue to microwave in 30-second intervals until the temperature reaches 160 degrees F.
  • Now stop cooking the rib in the microwave and transfer the steak onto a plate and serve right away.

Reheat using Sous Vide Method

You will be surprised at how easy it is to use the sous vide method. Sous vide is a process where food is vacuum-sealed and cooked or reheated in a low-temperature water bath.

It is a French word for under vacuum.

The gentle environment keeps the meat tender and juicy, which is why this method works so well. You can still maintain the doneness of rare prime rib if you reheat it with this method.

It requires a lot of time, that’s the downside. It takes at least an hour to re-warm small slices of prime rib using the sous vide method. This is the best route if the quality is what you want.


  • Slice the rib into equal pieces.
  • Place the ribs in a vacuum-sealed pouch.
  • Fill your sous vide machine with water.
  • Set the sous vide machine temperature to 140 degrees F if you want medium doneness. If you want a medium to well-done steak, set the temperature to 165 degrees F.
  • Place the bag into the pot and cook for 1 hour.

Tip: You don’t need sous vide machine to do this. Just a large pot is enough.


How to Reheat Prime Rib Slices?

Prime rib slices can be reheated using the following methods: oven, steamer, or microwave. It is important to keep in mind that the time required to re-warm will vary depending on the thickness of the meat.

It is recommended to slice the prime rib into equal or similar sizes so that they can be reheated evenly.

You don’t want to do the same thing for prime rib slices if you want to let a whole roast rest after reheating.

It will only dry them out if these smaller pieces are not allowed to sit around.

How Do You Reheat a Roast Without Drying It Out?

If you are concerned about drying out leftover prime rib in the oven, you can turn it off once the oven has reached a certain temperature.

Put the roast beef in the fridge and let it thaw out for 10 minutes.

It will take about 20 minutes for frozen prime rib to thaw. Rewarming prime rib straight from the freezer is not something I recommend.

It is best to thaw it in the fridge before use. If you thaw the meat over the counter, it will be more likely to be exposed to bacteria.

Wrap the roast in aluminum foil to make sure that it doesn’t dry out. The foil protects the meat from being exposed to too much heat, which can cause juices to go right out of it.

If you want to keep the meat moist, drizzling it with leftover au jus or beef stock is a good way to do this.

Can You Reheat a Medium Rare Prime Rib?

There is no question about it. The sous vide is the best approach for this circumstance. It is important to make sure that the temperature of the water is not over 140 degrees.

If you don’t have a sous vide machine, you can put a temperature in the pot of water to make sure it stays at the correct temperature.


These are the methods you can use to reheat your prime rib. But I recommend you use the sous vide method to get the best results.

Even if you don’t have sous vide machine with you, you can use a large pot instead of the machine. 

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