Revive the Juicy Flavors: A Step-by-Step Guide on Reheating Medium Rare Prime Rib

How to Reheat Medium Rare Prime Rib: A Step-by-Step Guide


If you’ve ever had the pleasure of indulging in a perfectly medium rare prime rib, you know just how tender and flavorful it can be. But what happens when you have leftovers? Reheating this delicate cut of beef without overcooking it may seem like a daunting task. Fear not! In this comprehensive guide, we will walk you through the process of reheating medium rare prime rib to perfection.

Gather Your Ingredients and Tools:

Before diving into the reheating process, let’s make sure we have everything we need:

  • Leftover medium rare prime rib slices
  • An oven-safe dish or baking sheet
  • An instant-read thermometer
  • Foil or cling wrap for covering the dish
  • Tongs or a fork for handling the meat

The Best Method: Oven Reheating:

Step 1: Preheat your oven.

To ensure even heating throughout, preheat your oven to 250°F (120°C). This low temperature helps retain moisture and prevents further cooking of the meat.

Step 2: Prepare your prime rib slices.

If your leftover prime rib is still intact as a roast, slice it into individual portions about half an inch thick. This allows for more even heat distribution during reheating. If already sliced, skip ahead to step three.

Step 3: Arrange in an oven-safe dish.

Lay out your prime rib slices in a single layer inside an oven-safe dish or on a baking sheet. Avoid overcrowding to ensure uniform reheating.

Step 4: Cover with foil or cling wrap.

Seal the dish tightly with foil or cling wrap, creating a tent-like cover that traps heat and moisture, preventing your prime rib from drying out.

Step 5: Reheat in the oven.

Place your covered dish in the preheated oven and let it warm up gradually for about 15-20 minutes. Keep an eye on the internal temperature to prevent overcooking—it should reach around 120°F (49°C) for medium-rare perfection.

An Alternative Method: Sous Vide Reheating:

Step 1: Prepare your sous vide water bath.

If you own a sous vide immersion circulator, this method can provide excellent results for reheating prime rib. Fill a large pot or container with water according to the manufacturer’s instructions and set your desired final temperature to approximately 120°F (49°C).

Step 2: Seal prime rib slices in bags.

Slice your leftover prime rib into individual portions if not already done so. Place each slice into separate vacuum-sealed bags or ziplock bags using the water displacement method to remove air before sealing them shut tightly.

Step 3: Submerge in hot water bath


Gently lower your sealed bags of prime rib into the preheated water bath, ensuring they are fully submerged. Use clips or weights if needed to keep them beneath the surface during cooking time.


If you’re using ziplock bags without vacuum-sealing equipment, make sure they are food-grade and appropriate for high temperatures; otherwise, use specifically designed sous vide bags.

Step 4: Reheat and monitor the temperature.

Allow the prime rib to reheat in the water bath for approximately 30-45 minutes. Periodically check with an instant-read thermometer to ensure it reaches an internal temperature of around 120°F (49°C).

Serving and Enjoying Your Reheated Prime Rib:

Once your reheating method is complete, carefully remove the prime rib from either the oven or water bath. Let it rest for a couple of minutes before serving to allow any remaining heat to distribute evenly throughout each slice. Serve alongside your favorite side dishes, au jus, or horseradish sauce for added flavor. Now sit back, savor every bite of that tender medium rare prime rib perfection, and pat yourself on the back!


Reheating medium rare prime rib doesn’t have to be intimidating anymore! By following our step-by-step guide using either the oven or sous vide method, you can enjoy succulent slices just as if they were freshly cooked. Whether you choose traditional oven reheating or opt for precise sous vide cooking techniques, now you know how to bring out all those amazing flavors without sacrificing tenderness and juiciness in your leftover prime rib.

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