Beef tenderloin with creamy mushroom sauce is restaurant-quality cooking in under 45 minutes. Perfectly seared filets get draped in a luxurious, velvety mushroom cream sauce built in the same pan. It's perfect for a special date night and simple enough for a weeknight treat.
Craving a restaurant-quality meal without the fuss? Imagine this: perfectly seared, juicy beef tenderloin, draped in the most luxurious, velvety mushroom cream sauce you’ve ever tasted. This dish is pure indulgence on a plate. The earthy mushrooms, fragrant garlic, and rich cream cheese come together to create a sauce that’s simply divine. And the best part? This elegant, low-carb dinner feels incredibly decadent but comes together in under 45 minutes, making it perfect for a special date night or a simple weeknight treat.
Ingredients
• For the Creamy Mushroom Sauce
• Butter: 1.0 oz / 28.4 g
• Garlic: 3 cloves, minced, approx. 0.5 oz / 15 g
• Dried Thyme: 1 teaspoon, approx. 0.04 oz / 1 g
• Fresh Button Mushrooms: 1.5 cups, sliced, approx. 4.5 oz / 127.5 g
• Cream Cheese: 7.0 oz / 198.5 g, softened or cut into cubes
• Heavy Cream: 0.5 cup, approx. 4.2 oz / 120 g
• Salt and pepper to taste
• For the Beef
• Beef Tenderloin Filets: 4 6.0 oz / 170.1 g grass-fed filets
• Butter: 1.0 oz / 28.4 g
• Salt and freshly ground black pepper to taste
Instructions
1. Prepare the Mushroom Sauce
2. Melt 1 oz / 28.4 g of butter in a medium skillet over medium heat. Add the minced garlic and dried thyme, and sauté for 1 minute until fragrant.
3. Add the sliced mushrooms, season with salt and pepper, and cook for about 7 minutes, stirring occasionally, until beautifully browned and tender.
4. Reduce the heat to low. Stir in the cream cheese until it’s completely melted and smooth.
5. Slowly whisk in the heavy cream. Allow the sauce to simmer gently for 3-5 minutes to thicken, but do not let it boil. Keep warm on the lowest setting.
6. Cook the Steaks
7. Pat the beef filets completely dry with a paper towel and season all sides generously with salt and freshly ground black pepper.
8. Melt the remaining 1 oz / 28.4 g of butter in a large cast-iron skillet over medium-high heat.
9. Once the butter is sizzling, carefully place the filets in the skillet. Sear for 3-5 minutes per side for a perfect medium-rare, adjusting for thickness and your preferred doneness.
10. Transfer the steaks to a cutting board and let them rest for at least 5 minutes. This crucial step allows the juices to redistribute for a tender, flavorful bite.
11. Serve
12. Plate the rested beef filets and generously spoon the warm, creamy mushroom sauce over the top. Serve immediately and enjoy!
Nutritional Information
• Nutrition (Per Serving)
• Calories: 687
• Fat: 60 g
• Carbs: 3.5 g
Pro Tips
• For a deeper, earthier flavor, swap button mushrooms for cremini (baby bella) or a mix of wild mushrooms.
• Use a meat thermometer for guaranteed results: 130-135°F (54-57°C) for medium-rare, 140-145°F (60-63°C) for medium.
• To prevent a grainy sauce, ensure your cream cheese is softened to room temperature and add the heavy cream slowly while whisking constantly.
• After cooking the mushrooms, deglaze the pan with a splash of dry white wine or brandy before adding the cream cheese for an extra layer of flavor.
FAQ
Q: What kind of mushrooms are best for this sauce
A: While the recipe calls for button mushrooms, you can easily elevate the flavor by using cremini (baby bella) mushrooms for a deeper, earthier taste. A mix of wild mushrooms would also be a delicious and gourmet option for this creamy mushroom sauce.
Q: How do I get a perfect medium-rare steak
A: The key to a perfect medium-rare beef tenderloin is using a meat thermometer. Sear the steak for 3-5 minutes per side and aim for an internal temperature of 130-135°F (54-57°C). Remember to let the steak rest for at least 5 minutes before slicing to ensure it’s juicy and tender.
Q: Is this beef tenderloin recipe keto-friendly
A: Yes, this is an excellent low-carb and keto-friendly recipe. With only 3.5g (0.12 oz) of carbs per serving, this elegant steak dinner fits perfectly into a ketogenic lifestyle without sacrificing any flavor or decadence.
Q: How can I prevent my cream sauce from becoming grainy
A: To ensure a velvety smooth mushroom cream sauce, make sure your cream cheese is softened to room temperature before adding it to the pan. It’s also important to whisk in the heavy cream slowly over low heat. This prevents the dairy from curdling and results in a perfectly smooth texture.
Pro Tips
- Give the sliced mushrooms a full 7 minutes in the butter until they're properly browned and tender — that's where the sauce's earthy depth comes from.
- Swap the button mushrooms for cremini (baby bella) or a mix of wild mushrooms for a deeper, earthier flavor without changing anything else.
- Soften the cream cheese to room temperature and pour in the heavy cream slowly while whisking constantly — this is what keeps the sauce smooth instead of grainy.
- Let the sauce simmer gently 3-5 minutes to thicken but never let it boil, which can break the cream.
- Sear the filets 3-5 minutes per side in sizzling butter to 130-135°F / 54-57°C for medium-rare, then rest them 5 minutes before spooning the sauce over.
Frequently Asked Questions
Is this beef tenderloin dinner keto-friendly?
Yes — each serving has about 3.5g of carbohydrates with 48g of protein and 60g of fat. The mushroom sauce is cream-cheese based with no flour at all.
My sauce turned out grainy — what happened?
The cream cheese likely wasn't soft enough, or the cream went in too fast. Bring the cream cheese to room temperature and whisk the heavy in slowly off the heat.
What doneness should I cook the filets to?
130-135°F (54-57°C) for medium-rare or 140-145°F (60-63°C) for medium, checked with a meat thermometer after the 3-5 minute-per-side sear. Rest 5 minutes before saucing.
Can I make the mushroom sauce ahead of time?
Yes — it keeps 3-4 days in the fridge and reheats gently over low heat. Sear the filets fresh so the crust and the sauce both land at their best.
Recipe card below.
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Beef Tenderloin with Creamy Mushroom Sauce
Ingredients
Method
- Prepare the Mushroom Sauce
- Melt 1 oz / 28. 4 g of butter in a medium skillet over medium heat.
- Add the minced garlic and dried thyme, and sauté for 1 minute until fragrant.
- Add the sliced mushrooms, season with salt and pepper, and cook for about 7 minutes, stirring occasionally, until beautifully browned and tender.
- Reduce the heat to low.
- Stir in the cream cheese until it's completely melted and smooth.
- Slowly whisk in the heavy cream. Allow the sauce to simmer gently for 3-5 minutes to thicken, but do not let it boil.
- Keep warm on the lowest setting.
- Cook the Steaks
- Pat the beef filets completely dry with a paper towel and season all sides generously with salt and freshly ground black pepper.
- Melt the remaining 1 oz / 28. 4 g of butter in a large cast-iron skillet over medium-high heat.
- Once the butter is sizzling, carefully place the filets in the skillet.
- Sear for 3-5 minutes per side for a perfect medium-rare, adjusting for thickness and your preferred doneness.
- Transfer the steaks to a cutting board and let them rest for at least 5 minutes. This crucial step allows the juices to redistribute for a tender, flavorful bite.
- Serve
- Plate the rested beef filets and generously spoon the warm, creamy mushroom sauce over the top.
- Serve immediately and enjoy!
- After cooking the mushrooms, deglaze the pan with a splash of dry white wine or brandy before adding the cream cheese for an extra layer of flavor.
