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Oven Roasted Beef Tenderloin With Garlic Herb Butter 🥩

Feyza Kırmacı
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Searching for a tasty keto dish? Try our Oven Roasted Beef Tenderloin! This juicy beef comes with a great garlic herb sauce. And guess what? Making it is a breeze. Keep reading, and we'll show you how to cook beef tenderloin in simple steps!

Homemade oven-roasted beef tenderloin sliced displaying its pinkish center, on a white plate.
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Preparation and cooking overview

Making this beef tenderloin recipe is simpler than you might think! Just marinate the beef tenderloin in our special garlic herb sauce, give it a quick sear in a skillet, then pop it in the oven. In just 40 minutes, you'll be savoring a mouthwatering garlic herb tenderloin.

Chef's note

Press the minced garlic, rosemary, and thyme onto the meat's surface for a deep, rich flavor. This will help the herbs release their aromatic oils and flavors as they cook.

  • Prep Time: 5 minutes
  • Cooking Time: 30 minutes
  • Rest Time: 5 minutes
  • Total Time: 40 Minutes
  • Difficulty Level: Easy
  • Recipe Makes 3 Servings

For more inspiration check out our Beef recipe.

🥩 Ingredients for the oven-roasted beef tenderloin recipe

To make the keto beef tenderloin at home, you'll need the following ingredients:

  • 1 pound beef tenderloin
  • 2 tablespoons olive oil
  • 3 cloves garlic, minced
  • 1 tablespoon chopped fresh rosemary
  • 1 ½ tablespoons chopped fresh thyme
  • Sea salt, to taste
  • Freshly cracked black pepper, to taste
  • 3 tablespoons unsalted butter
Beef tenderloin, olive oil, minced garlic, chopped fresh rosemary, chopped fresh thyme, sea salt, black pepper, and unsalted butter gathered and displayed on the table.

Ingredient substitutions

If you're not a fan of some of the ingredients, consider these alternatives:

  • Fresh herbs: Swap out rosemary and thyme for sage or oregano to adjust the flavor.
  • Butter: Choose ghee or premium coconut oil if you're looking for a dairy-free option.
  • Olive oil: Try coconut or avocado oil for a unique taste twist.

Additional ingredients

Enhance the flavor of your oven-roast beef tenderloin recipe with these optional ingredients:

  • Dijon mustard: Blend a tablespoon with olive oil and herb mix for a deeper flavor.
  • Lemon zest: Introduce a zesty twist by including some lemon zest in the sauce.
  • Crumbled blue cheese: After cooking, top your steaks with crumbled blue cheese for a robust, cheesy kick.
  • Fresh parsley: Garnish your roasted steaks with fresh parsley for a splash of color and freshness.
  • Green onion: A sprinkling of chopped green onion adds a sharp and refreshing finish.
Homemade beef tenderloin steaks with garlic butter herbs are in a cast iron skillet.

Cooking tools required

To make this beef tenderloin recipe, you'll need the following kitchen tools:

  • Cast-iron skillet
  • Bowl
  • Whisk
  • Knife
  • Cutting board
  • Meat thermometer
  • Measuring spoons

Tool substitutes list

  • Cast-iron skillet: If you don't have a cast-iron skillet, use a heavy non-stick pan to sear the meat. Then, transfer it to a baking dish for roasting.
Homemade oven-roasted beef tenderloin steaks served on a white plate, with some sliced to reveal their pink centers.

How to make Oven Roasted Beef Tenderloin: step-by-step guide

Cooking methods

  • Pan-searing
  • Oven-roasting

Preparation steps

  1. Gather and measure all the ingredients.
  2. Peel and mince the fresh garlic cloves.
  3. Wash the fresh thyme and rosemary and chop them finely.
  4. Let the beef tenderloin sit at room temperature for about 30 minutes before cooking.

Cooking steps

  1. Preheat the oven to 400°F (200°C).
  2. Combine the olive oil, minced garlic, chopped rosemary, thyme, salt, and pepper in a mixing bowl. Thoroughly coat the beef tenderloin with this herbed butter mixture.
  3. Warm your cast-iron skillet over medium-high heat.
  4. Once hot, lay the beef tenderloin in the skillet. Add butter and let it melt, ensuring the beef is coated. Sear the beef for about 2 minutes on each side until you get a golden-brown crust.
  5. After searing, move the skillet with the beef into the already-preheated oven.
  6. Roast for 15-20 minutes. For a medium-rare finish, ensure the meat's internal temperature is around 135°F (60°C). Use a meat thermometer for this step.
  7. Once done, take the skillet out of the oven. Allow the tenderloin to sit for approximately 5 minutes to allow the juices to settle nicely. Then, carve into thick, beautiful slices.
  8. Your cast iron beef tenderloin is ready to serve!

Chef's pro tip

To achieve a perfectly browned crust, always preheat your skillet before placing the beef tenderloin steaks in it. Use a meat thermometer to get your filets just right for the best results. Here's a handy temperature guide:

  • Rare: 130°F (55°C)
  • Medium: 145°F (65°C)
  • Medium-well: 155°F (70°C)
  • Well-done: 165°F (75°C)

What to serve with roasted beef tenderloin?

Pair your roasted beef tenderloin with keto-friendly sides for a complete meal. Here are some delicious options:

White plate featuring homemade oven-roasted beef tenderloin steaks, with several slices displaying pink centers.

How to make it healthier?

Follow these health-conscious best practices to make the best oven-roasted beef tenderloin:

  • Trim the fat: To preserve the meat's flavor, it's crucial to keep some marbling. However, for a leaner dish, use a sharp knife to trim away any larger pieces of excess fat carefully.
  • Limit salt: Use salt in moderation. Overconsumption of salt can lead to water retention.
  • Add non-starchy veggies: Focus on non-starchy side veggies that are high in fiber and nutrients. Examples are broccoli, zucchini, and kale. You can sauté them in olive or avocado oil with some garlic for added flavor.

Time-saving tips

  • Instead of mincing garlic by hand, mince the garlic cloves with a garlic press.

What can I prepare ahead of time?

  • Prepare the garlic herb marinade and store it in an airtight container.
  • Trim excess fat from your beef tenderloin and ready it for cooking.

Storage and reheating instructions

Storage tips

  • Room temperature: Allow the leftovers to cool before storing them.
  • Fridge: Transfer the cooled tenderloin to an airtight container and refrigerate. It'll stay fresh and tasty for 2-3 days.

Best reheating practices

  • Oven: Set your oven to 325°F (160°C). Put the leftovers in an oven-safe dish, cover with aluminum foil, and warm for 10-15 minutes or until thoroughly heated.
  • Stove: On medium heat, warm a skillet. Add the leftovers along with a bit of broth or water. Cover and heat for 5-7 minutes, flipping occasionally.
Sliced beef tenderloin showcasing its pink center, presented on a white plate.

Recipe wrap-up conclusion

This Oven Roasted Beef Tenderloin recipe is an easy way to enjoy a low-carb dish for dinner or a special occasion. Enjoy it alone, or pair it with a yummy side dish for a complete meal. Either way, you're in for a tasty treat. It might soon become one of your favorite keto meals. So, put on your apron and cook a meal that's as delicious as it is nutritious!

Looking for more keto beef recipes? Here are some you can't miss!

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Filet Mignon
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Keto Beef Stroganoff
Garlic butter steak bites.
Garlic Butter Steak Bites
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Keto Beef Stew 
larger dimension version of Easy Keto Taco Meat in a skillet
Keto Taco Meat
Keto Stuffed Peppers in a cast iron skillet
Keto Stuffed Peppers

Frequently asked questions

Fresh herbs offer a more vibrant and aromatic flavor. But if you're using dried herbs, reduce the quantity by about half, as dried herbs are more concentrated.

You can cook it on a stovetop, just monitor the time and heat. However, oven roasting offers a consistent and even cook, ensuring you get the juiciest beef.

Opt for a beef tenderloin with an even marbling, vibrant red hue and firm texture. Also, make sure the cuts of meat have a uniform thickness for even cooking.

Roast the beef tenderloin in a preheated oven at 400°F (200°C) for 15-20 minutes or until it reaches your desired level of doneness. The medium-rare internal meat temperature should be around 135°F (60°C).

A 1-pound beef tenderloin generally contains around 850-900 calories. The number of calories in beef tenderloin might vary based on the cut and preparation method.

📖 Recipe

Homemade oven-roasted beef tenderloin steaks served on a white plate, a steak sliced to reveal their pink centers.

Oven Roasted Beef Tenderloin

This Oven Roasted Beef Tenderloin recipe delivers a succulent, herb-infused beef dish that's perfect for keto dinners or special occasions.
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Course: Main Course
Keyword: beef steak, beef tenderloin, oven roasted beef tenderloin, roast beef tenderloin
Prep Time: 5 minutes
Cook Time: 30 minutes
Resting Time: 5 minutes
Total Time: 40 minutes
Servings: 3
Calories: 606kcal

Ingredients

  • 1 pound beef tenderloin
  • 2 tablespoons olive oil
  • 3 cloves garlic minced
  • 1 tablespoon chopped fresh rosemary
  • 1 ½ tablespoons chopped fresh thyme
  • Sea salt to taste
  • Freshly cracked black pepper to taste
  • 3 tablespoons unsalted butter
US Customary - Metric

Instructions

  • Preheat the oven to 400°F (200°C).
  • Combine the olive oil, minced garlic, chopped rosemary, thyme, salt, and pepper in a mixing bowl. Thoroughly coat the beef tenderloin with this herbed butter mixture.
  • Warm your cast-iron skillet over medium-high heat.
  • Once hot, lay the beef tenderloin in the skillet. Add butter and let it melt, ensuring the beef is coated. Sear the beef for about 2 minutes on each side until you get a golden-brown crust.
  • After searing, move the skillet with the beef into the already-preheated oven.
  • Roast for 15-20 minutes. For a medium-rare finish, ensure the meat's internal temperature is around 135°F (60°C). Use a meat thermometer for this step.
  • Once done, take the skillet out of the oven. Allow the tenderloin to sit for approximately 5 minutes to allow the juices to settle nicely. Then, carve into thick, beautiful slices.
  • Your cast iron beef tenderloin is ready to serve!

Video

Nutrition

Nutrition Facts
Oven Roasted Beef Tenderloin
Amount Per Serving
Calories 606 Calories from Fat 486
% Daily Value*
Fat 54g83%
Saturated Fat 22g138%
Trans Fat 0.5g
Polyunsaturated Fat 3g
Monounsaturated Fat 24g
Cholesterol 136mg45%
Sodium 77mg3%
Potassium 501mg14%
Carbohydrates 2g1%
Fiber 1g4%
Sugar 0.04g0%
Protein 28g56%
Vitamin A 536IU11%
Vitamin C 7mg8%
Calcium 36mg4%
Iron 4mg22%
*

Nutritional values are estimates only and do not include carbs from sugar alcohols.

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