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How to Cook the Perfect Sirloin Roast

Sirloin roasts are really great for soaking up the flavors from delicious seasoning ingredients, and we’ll always recommend them to anyone on the lookout for a delicious roast recipe to serve to their family. When cooked in the right way and including the right ingredients, they turn out incredibly delicious (and we really hope you’ll be able to find any leftovers afterward).

In this article, we’ll show you how to cook the perfect sirloin roast and helpful tips to get the best out of your cooking. Timing is important with roast recipes; you don’t want to overcook or undercook your meat. As such, we advise that you also pay particular attention to the timing guidelines we’ve provided in this article in order to get the best possible results.

How To Cook The Perfect Sirloin Roast

Tips for Cooking the Perfect Sirloin Roast

The following tips and guidelines have been provided to guide you through the process of cooking sirloin roast recipes to a perfect quality:

Ideal timing and temperature – To begin with, the length of time a sirloin roast should spend in the oven is entirely dependent on its weight. Cook for roughly 15 to 20 minutes per pound of beef, but this can vary depending on your oven’s quality and how evenly it distributes heat around the roast.

Setting the oven to a high temperature and then lowering it to 325 degrees allows the outside of the roast to brown attractively without getting scorched. The lower temperature allows the meat to come up to the right internal temperature more gently.

The meat you’ll get at the end of your cooking depends entirely on the final temperature you choose for your roast to reach.

Get a meat thermometer – If you’re one of the home cooks that roasting meat tends to unnerve, especially in terms of overcooking or undercooking your meat, there’s no need to worry. That problem can be easily solved by purchasing a digital meat thermometer. You should look for one with a probe that you can stick into your roast and use to constantly check the meat’s temperature without having to open the oven door.

Taking this seemingly little precaution will guarantee excellent outcomes every time.

Rest the meat after cooking – It is really important to let your roast rest after it’s done cooking. You should take the roast out of the oven and let it cool for at least 10 minutes before serving. You should also pull the roast out early, and don’t worry about undercooking it; the residual heat will keep cooking the roast while it sits, leading you to tasty and properly done beef every time.


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Cooking Time for Sirloin Roast

Keep the following timing guidelines in mind when cooking a sirloin roast:

Cooking procedure Cooking time
Cooking a sirloin roast in the oven at 325 degrees Fahrenheit 15 minutes per pound (1 hour 40 minutes for a 6½ pound sirloin roast)
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How To Cook The Perfect Sirloin Roast

Perfect Sirloin Roast (12 Servings)

  • Author: Bobby


  • 1 beef sirloin roast, about 6.5 lbs
  • 1 large onion, (quartered with the peel on)
  • 2 celery ribs, each cut in half
  • 2 large carrots, peel on, each cut in half, both lengthwise and crosswise
  • 4 to 5 garlic cloves, peel on, smashed with the side of a knife
  • ½ cup of water

For the seasoning mixture

  • 3 tablespoon of dried onion flakes
  • 2 tablespoon of dried oregano
  • 1 tablespoon of coriander seeds
  • 1 tablespoon of Himalayan salt
  • 1 tablespoon of black peppercorns
  • 1½ teaspoon of chili pepper flakes


  1. Grind all of the seasoning ingredients together inside a coffee grinder or mortar a day before you plan to cook your roast.
  2. Trim any excess fat from the flesh before rubbing this spice mixture all over the roast. Place the roast inside the refrigerator until the next day, make sure it’s carefully wrapped in multiple layers of plastic film. Place the roast on a dish or rimmed plate to catch any drips that may occur.
  3. As soon as it’s time to cook your roast, take it out of the fridge, take it out of the plastic wrap, then tie it up with butcher’s twine if it isn’t already knotted.
  4. Preheat your oven to 325 degrees Fahrenheit.
  5. Put the celery, onion, carrot, garlic, and water in a big baking dish and lay the roast on top of the vegetables; doing this will make sure the air circulates all around the roast and keep it moist, thus infusing some delicious flavors into it.
  6. Cook the roast in the oven for 15 minutes per pound, till you push a meat thermometer into its thickest part and the roast registers 115°F to 125°F, (this will depend on your desired doneness level).
  7. Switch off the oven and cover your roast with aluminum foil for another 20 to 40 minutes, or until a meat thermometer registers 130°F for rare doneness, 145°F for medium-rare doneness, 160°F for medium doneness, and 170°F for well done results. We do not recommend going past a medium-rare doneness level with your recipe because this will give your roast a really tough and leathery quality.
  8. Remove the roast from the oven and leave it to rest for another 20 minutes, lightly tented. The roast should then be transferred to the top of a cutting board, the string removed, and the roast carved and served.

If you’re interested in more recipe ideas for sirloin beef roast recipes, then you should love this video recipe we’ve suggested for you to watch.


  • The roast in this recipe weighed 6.5 pounds and took 1 hour and 40 minutes in total to cook, with a 20-minute rest in the oven and another 20 minutes on the counter. Its interior temperature reached 132°F.

With this simple, reliable cooking procedure, you can conveniently get the perfect sirloin beef roast every time you attempt the recipe. It’s important to follow the cooking instructions correctly to guarantee desirable results. Also keep the timing guidelines in mind to keep from overcooking or undercooking your roast, although using a meat thermometer to monitor the roast’s temperature is your best bet in this regard.