Marinade Injected Beef Roast

Marinade Injected Beef Roast at

I had great success injecting marinade into pulled pork in a prior post. Why not do it with beef? You could get more flavour and that is usually a good thing.

There is a reason why not. If you inject beef in several places you run the risk of moving pathogens (germs for us uneducated) into the centre of the meat. Therefore, you have to cook it to an internal temperature of at least 155 F to be food safe. If you want it rare, you’re out of luck.

As She Who Must Be Obeyed likes her meat at least medium, this was not a problem for her and I was willing to give it a try so I fired up the Louisiana Grills pellet smoker and gave it a go.

I picked up a nice 1.1 kilogram (2 1/2 pound) top sirloin roast. I mixed the injection ingredients together and used an injection syringe to put the liquid in both sides of the roast. I would push the syringe into the beef and slowly pull it out while injecting. I injected every inch or so on both side. Do this in a pan as there will be some injection fluid leak out.

Then I rubbed the surface with Louisiana Grills Chophouse Steak Rub. If you don’t have that, use any steak spice you have. Montreal Steak Spice would be great.

Injected Beef Roast 1

I put the roast on the pellet smoker, preheated to 270 F with a temperature probe inserted so I could keep track of the internal temperature. Remember, you must cook it to 155 F. You could also use a 325 F oven for about 50 minutes but it won’t have that nice kiss of smoke.

It took just under two hours to get to 155 F.

Injected Beef Roast 2

I brought the roast in and let is rest for 10 minutes and carved it.

Injected Beef Roast 3

We served it with She Who Must Be Obeyed’s wonderful potato salad and broccoli salad.

Injected Beef Roast 4

The Verdict

Love it. the texture of the beef wasn’t affected at all. Love it. The ingredients in the injecting marinade all have a umami taste that enhances the beef taste without overpowering the beef taste. Love it. It tasted like well seasoned beef. Love it. The smoke from the pellet smoker added an extra complexity. Love it.

Did I mention I love it.

The Old Fat Guy

Marinade Injected Beef Roast

Yield: 6 servings

Marinade Injected Beef Roast


  • 1.1 kilogram (2 1/2 pound) beef roast
  • 15 ml (1 tablespoon) Montreal or other steak spice or rub.
  • Injecting Marinade:
  • 125 ml (1/2 cup) beef stock
  • 15 ml (1 tablespoon) soy sauce
  • 15 ml (1 tablespoon) Worcestershire sauce
  • 3 ml (1/2 teaspoon) onion powder
  • 3 ml (1/2 teaspoon) garlic powder


  1. Mix together the injecting marinade.
  2. With an injecting syringe, inject the marinade every inch of both sides of the roast.
  3. Spread the steak spice over the surface of the roast.
  4. Put in a smoker preheated to 270 F. You could also use an oven but would not get a smoke taste.
  5. Cook to an internal temperature of 155 F or higher. Due to the injecting process, it is not safe to cook it less.
  6. Let rest for 10 minutes before slicing.
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10 thoughts on “Marinade Injected Beef Roast”

  1. Looks as good as a prime rib, nice job as always, and cooking it to 155 to be safe is a great idea, it still looks on the rare side to me. I’m going to guess that you loved it!!!

    1. Sadly, no. It is not the marinade that introduces the pathogens. They may be present on the surface of the meat. This is usually not a problem as the outside of the meat gets cooked to a high temperature that kills them. However, when you push a syringe into the meat several times, you run the risk of transporting the pathogens from the surface to the interior. If you only cook the interior to 125 F (rare) that is not hot enough to kill the germs.

      1. If you did this and then used Sous Vide at 131f you could easily reach pasteurization without over cooking. It will take a few hours holding at that temp but it will still be very much on the rare side and safe. Stick the roast in a hot oven or use a grill to sear the outside and you’re done!

  2. Ok…I don’t want to start an argument but…
    Our food safety guy says if you use good sterilization procedures on your injector and boil the injection liquid for several minutes then cool it in the fridge before injection there’s literally a zero chance of contamination…
    He is a safe food instructor at the professional level and has worked for various health departments and said there has never been a case of food born illness traced to contamination through injection when proper procedures were followed.
    The myths surrounding inserting a meat probe thermometer into cold meat causing contamination for the same reason(s) stated in this article have largely been debunked in meat smoking circles.

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