Slow Roasted Beef Tenderloin

Roasted Beef Tenderloin

With a few simple ingredients and a little patience, you’ll create a succulent and flavorful roasted beef tenderloin that will have everyone coming back for seconds. The slow-roasting method ensures a juicy and tender result, while the garlic herb butter adds an aromatic touch.

Slow Roasted Beef Tenderloin

Recipe by Melissa Nicholson Course: Main


Prep time


Cooking time






  • 2-3 lbs 2-3 beef tenderloin, center-cut, trimmed of fat and silver skin

  • 2 tbsp 2 olive oil

  • 4 cloves 4 garlic, minced

  • 1 tbsp 1 fresh thyme leaves

  • 1 tbsp 1 fresh rosemary leaves

  • 2 tsp 2 salt

  • 1 tsp 1 black pepper

  • 4 tbsp 4 unsalted butter, softened


  • Preheat your oven to 275°F (135°C).
  • Take the beef tenderloin out of the refrigerator and let it sit at room temperature for about 30 minutes before cooking.
  • In a small bowl, combine the minced garlic, thyme, rosemary and softened butter. Mix them well to form a garlic herb butter. Set aside.
  • Pat the beef tenderloin dry with paper towels. Position the beef tenderloin on a clean cutting board or work surface and tie with 2-3 feet of butcher's twine. Season with salt and pepper.
  • Heat a skillet or oven-safe pan over medium-high heat. Add olive oil to the pan and sear the beef tenderloin on all sides until nicely browned. This will take about 3 to 4 minutes per side.
  • Rub the garlic herb butter all over the beef tenderloin, making sure to coat it evenly.
  • Transfer the beef tenderloin to a roasting pan if your skillet is not oven safe.
  • Place the roasting pan in the preheated oven. Slow-roast the tenderloin for about 1.5 to 2 hours, or until it reaches a few degrees less than your desired level of doneness. The internal temp will continue to rise as it rests. See notes for levels of doneness.
  • Remove the tenderloin from the oven and let it rest for about 15 minutes before slicing.


  • Here are the ranges for different levels of doneness:
  • Rare: 120°F to 125°F (49°C to 52°C)
  • Medium Rare: 130°F to 135°F (54°C to 57°C)
  • Medium: 140°F to 145°F (60°C to 63°C)


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Meet Melissa

Bourbon stole my heart a few years ago when I had several opportunities to write about it. Food stole my heart when I was lucky enough to be raised by a mom who managed to make nearly everything from scratch when we were growing up.